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Lymphocytes without surface receptors
Null cells, a subset of large circulating white blood cells, mimic the appearance of T or B lymphocytes but do not possess their defining surface receptors
Null_cell
Tumor of the pituitary gland
normal, basophilic, gonadotroph cells) True null cell adenomas are typically composed of uniform, mildly atypical cells with chromophobic cytoplasm. This
Pituitary_adenoma
Early embryonic mass that gives rise to the fetus
these TE cells, indicating Cdx2 plays a role in suppressing Oct4 in this cell lineage. Moreover, embryonic stem cells can be generated from Cdx2-null mice
Inner_cell_mass
Nonfunctional allele caused by a genetic mutation
A null allele is a nonfunctional allele (a variant of a gene) caused by a genetic mutation. Such mutations can cause a complete lack of production of the
Null_allele
American singer-songwriter musician (born 1965)
two albums, Ghosts I–IV and The Slip, independently on his own label, The Null Corporation. In 2009, Nine Inch Nails went on hiatus following the Wave Goodbye
Trent_Reznor
Transformation of a stem cell to a more specialized cell
significant decrease in neural stem cell proliferation along with increased astrocyte proliferation in Bmi null mice. An alternative model of cellular
Cellular_differentiation
There are 10 cells. If the null hypothesis had specified a single distribution, rather than requiring λ to be estimated, then the null distribution of
Minimum_chi-square_estimation
Medical condition
male-to-female ratio of 1.6. The majority of the underlying tumors are "null cell" or nonsecretory tumors, which do not produce excessive amounts of hormones;
Pituitary_apoplexy
Medical condition
lesions exhibit large malignant T-cells or null cells (i.e. cells lacking many T-cell receptor proteins) with "Hallmark" cell features of anaplasia, pleomorphism
Anaplastic large-cell lymphoma
Anaplastic_large-cell_lymphoma
Statistical hypothesis test
quantities over all of the cells is the test statistic; in this case, ≈ 24.57 {\displaystyle \approx 24.57} . Under the null hypothesis, this sum has approximately
Chi-squared_test
Statistical method for handling multiple comparisons
discovery rate (FDR) is a method of conceptualizing the rate of type I errors in null hypothesis testing when conducting multiple comparisons. FDR-controlling
False_discovery_rate
Machine instruction that indicates to a computer to do nothing
NOP or null statement if it has no effect. Null statements may be required by the syntax of some languages in certain contexts. In Ada, the null statement
NOP_(code)
Evaluates how likely it is that any difference between data sets arose by chance
each cell with equal frequency. The "theoretical frequency" for any cell (under the null hypothesis of a discrete uniform distribution) is thus calculated
Pearson's_chi-squared_test
Cell line
Schwenk H, Bornkamm G (1977). "Characterization of EBV-genome negative "null" and "T" cell lines derived from children with acute lymphoblastic leukemia and
Jurkat_cells
Post-translational carbohydrate modification of proteins
maturation. OGT knockdown had a diminished effect on SREBP-1 levels in AMPK-null cell lines. In a mouse model, OGT knockdown inhibited tumor growth but SREBP-1
O-GlcNAc
Progressive cystic lung disease
is required for mTOR activation. In TSC2-null and human LAM cells, Rho GTPase activity is required for cell adhesion, motility, proliferation and survival
Lymphangioleiomyomatosis
Diagnosis classification
Cutaneous T-cell lymphoma, NOS (C44._) Cutaneous lymphoma, NOS M9714/3 Anaplastic large cell lymphoma, T cell and Null cell type Anaplastic large cell lymphoma
International Classification of Diseases for Oncology
International_Classification_of_Diseases_for_Oncology
Medical condition
immunohistochemical study of 39 tumors, with evidence for a CSF1-producing "null cell" population". Virchows Archiv. 481 (5): 739–750. doi:10.1007/s00428-022-03408-2
Plexiform fibrohistiocytic tumor
Plexiform_fibrohistiocytic_tumor
Classification based on antibodies and antigens on RBC surfaces
Antigen B with antibody A Antigen AB with neither antibody A nor B Antigen null (group O) with both antibodies A and B There is an agglutination reaction
Blood_type
Protein-coding gene in the species Homo sapiens
"Retroviral mediated expression of the human myeloid nuclear antigen in a null cell line upregulatesDlk1 expression". Journal of Cellular Biochemistry. 86
DLK1
Glial cell type
cells or neurolemmocytes (named after German physiologist Theodor Schwann) are the principal glia of the peripheral nervous system (PNS). Glial cells
Schwann_cell
Human blood group classification
needed] Jk(a-b-) represents the null phenotype and usually results from homozygosity for a silent gene at the JK locus. The null phenotype is rare in most populations
Kidd_antigen_system
Medical condition
retroelements accumulates in Trex1-deficient cells; however, the upregulation of retroelements in TREX1-null cells has recently been disputed. Similarly, another
Aicardi–Goutières_syndrome
American film critic (born 1971)
"Hollywood's Next Anti-Piracy Crusade: Crappy Cell Phone Copies". Wired. Retrieved 11 January 2015. Null, Christopher (3 April 2013). "Hacking Media Production
Christopher_Null
Voltmeter
voltage can be calculated from the position of the sliding contact. This null-balance measuring method is still important in electrical metrology and standards
Potentiometer (measuring instrument)
Potentiometer_(measuring_instrument)
T cell that kills infected, damaged or cancerous cells
A killer T cell (also known as TC, cytotoxic T lymphocyte, CTL, T-killer cell, cytolytic T cell, CD8+ T-cell or cd8) is a T lymphocyte (a type of white
Cytotoxic_T_cell
Vesicles found outside cells
megakaryocyte-derived microparticles transfer CXCR4 receptor to CXCR4-null cells and make them susceptible to infection by X4-HIV". AIDS. 17 (1): 33–42
Extracellular_vesicle
Immunodeficient laboratory mice brand
lymphoid and myeloid cell development in NOD/LtSz-scid IL2R gamma null mice engrafted with mobilized human hemopoietic stem cells" (PDF). J. Immunol. 174
NSG_mouse
2026 studio album by Nine Inch Nails and Boys Noize
under the collaborative banner Nine Inch Noize. It was released via the Null Corporation and Interscope Records on April 17, 2026. Described as a live
Nine_Inch_Noize_(album)
Human blood group system involving 49 blood antigens
human blood group system. It contains proteins on the surface of red blood cells. After the ABO blood group system, it is most likely to be involved in transfusion
Rh_blood_group_system
Overexpression of Bck2 in Swi6-null cells resulted in changes in expression of genes known to be regulators of the cell cycle, or cell cycle dependent. 40% of
BCK2
Conditional statement which is true because the antecedent cannot be satisfied
cell phones in the room are turned on and all cell phones in the room are turned off", can only be true vacuously, and it implies "there are no cell phones
Vacuous_truth
Observed inability to reproduce scientific studies
are presented here. In the most common case, null hypothesis testing, there are two hypotheses, a null hypothesis H 0 {\displaystyle H_{0}} and an alternative
Replication_crisis
Mammalian protein found in Homo sapiens
inhibition of tumor growth and neovascularization in null mice, in contrast, when perlecan-null cells are injected into nude mice enhanced tumor growth is
Perlecan
transcriptase inhibitors (NRTI) – nucleotide – nucleotide analogs – nucleus – null cell ocular – off-label use – oncology – open-label trial – opportunistic infections
Index of HIV/AIDS-related articles
Index_of_HIV/AIDS-related_articles
Protein-coding gene in the species Homo sapiens
"Retroviral mediated expression of the human myeloid nuclear antigen in a null cell line upregulates Dlk1 expression". Journal of Cellular Biochemistry. 86
MNDA
Specialized neuron in the cerebellum
learning and altered cerebellar synaptic plasticity in pep-19/PCP4-null mice". Mol. Cell. Biol. 31 (14): 2838–44. doi:10.1128/MCB.05208-11. PMC 3133400.
Purkinje_cell
Protein-coding gene in the species Homo sapiens
ability was also removed and allowed for cell proliferation. The re-expression of CRABP1 in CRABP1 null cells brought back the induced apoptotic activity
CRABP1
Human blood group classification
hematopoiesis and bone marrow cell outputs depend on the expression of DARC in the erythroid lineage. Individuals with the Duffy-null genotype have a persistently
Duffy_antigen_system
Set of rules defining correctly structured programs for the Rust programming language
analogous to the null pointer. Option implements a "null pointer optimization", avoiding any spatial overhead for types that cannot have a null value (references
Rust_syntax
Type of color vision
dichromatic opponent-color space are the missing color, the null-luminance plane, and the null-chrominance plane. The description of the phenomena itself
Dichromacy
Protein-coding gene in the species Homo sapiens
approximately one every 7,600 nucleotides in RNASEH2-null cells, amounting to around 1,300,000 lesions per cell. This estimate aligns with in vitro rates of misincorporation
RNASEH2B
Indian student (2002–2021)
single "null" space, so a cell bordering it is considered adjacent to the cell on the direct opposite side of the null area. (E.g., a pawn on a cell bordering
Hridayeshwar_Singh_Bhati
Formal linear combination in a cell complex
algebraic topology, a k-chain is a formal linear combination of the k-cells in a cell complex. In simplicial complexes (respectively, cubical complexes)
Chain_(algebraic_topology)
Protein-coding gene in the species Homo sapiens
AMPK and reduces p27Kip1 levels in Tsc2-null cells via mTORC1-independent mechanisms: implications for cell proliferation and tumorigenesis". Oncogene
RHEB
Self-balancing binary search tree data structure
(non-NULL) black node (of black height ≥ 1), symbolises the color red or black of a non-NULL node, but the same color throughout the same diagram. NULL nodes
Red–black_tree
Formation of blood cellular components
HSCs are self-renewing cells: when they differentiate, at least some of their daughter cells remain as HSCs so the pool of stem cells is not depleted. This
Haematopoiesis
Mammalian protein found in Homo sapiens
c-jun is required for progression through the G1 phase of the cell cycle, and c-jun null cells show increased G1 arrest. C-jun regulates the transcriptional
Transcription_factor_Jun
Protein-coding gene in the species Homo sapiens
(Sep 2005). "Loss of SMEK, a novel, conserved protein, suppresses MEK1 null cell polarity, chemotaxis, and gene expression defects". Molecular and Cellular
SMEK2
Protein involved in multiple prion diseases
shown significant cognitive abnormalities. As the PrP-null mice age, a marked loss of Purkinje cells in the cerebellum results in decreased motor coordination
Major_prion_protein
Braille system for Standard Chinese
are unified, as they never contrast. A null/zero initial (a vowel-initial syllable) is indicated with the null consonant ⠾. At least one letter in each
Two-cell_Chinese_Braille
Type of computer memory
Arnold Farber and Eugene Schlig, working for IBM, created a hard-wired memory cell, using a transistor gate and tunnel diode latch. They replaced the latch
Static_random-access_memory
Organic compound, experimental pharmaceuticum
Osteoclastogenesis in Bone Marrow-Derived Macrophages and Down-Regulate Sirt3 in Sirt1 Null Cells". PLOS ONE. 10 (7) e0134391. Bibcode:2015PLoSO..1034391G. doi:10.1371/journal
SRT-3025
Pioneering five-bit character encodings
to the positions where they have stayed ever since: the NULL or BLANK and the DEL code. NULL/BLANK was used as an idle code for when no messages were
Baudot_code
Sub-field of genomics
adenocarcinoma cells results in high endogenous reactive oxygen species, consistent with KRAS-driven pancreatic cancer, and essentially primes ME2-null cells for
Oncogenomics
Medical condition
Ovarian squamous cell carcinoma (oSCC) or squamous ovarian carcinoma (SOC) is a rare tumor that accounts for 1% of ovarian cancers. Included in the World
Ovarian squamous cell carcinoma
Ovarian_squamous_cell_carcinoma
Death of a cell mediated by intracellular program, often as part of development
Programmed cell death (PCD), sometimes referred to as cell suicide or cellular suicide, is the death of a cell as a result of events inside of a cell, such
Programmed_cell_death
Mammalian protein found in Homo sapiens
kinase adaptor protein α (STRADα) regulates cell polarity and invasion through PAK1 signaling in LKB1-null cells". The Journal of Biological Chemistry. 287
PAK1
Academic journal
competitors, the journal will consider for publication works reporting negative/null results, incremental advances, and replication studies, thus filling the
Heliyon
Heterodimeric receptor
localizes to the perinuclear endosomal compartment and is degraded. Tyk2 null cells retain some responsiveness to IFNβ. However, responsiveness to IFNα is
Interferon-alpha/beta receptor
Interferon-alpha/beta_receptor
500 – leukemia, mixed-cell MeSH C04.557.337.428.511.550 – leukemia, null-cell MeSH C04.557.337.428.511.800 – leukemia, t-cell, acute MeSH C04.557.337
List_of_MeSH_codes_(C04)
Topics referred to by the same term
command for turning a modem speaker off Measure zero, or M0, the size of the null set M0 macrophage, a phenotype of macrophage Search for "M0" , "M-0", "M0's"
M0
Proposed braille alphabet of the Inuktitut language
identical to the null-consonant syllables ᐅ u and ᐊ a as well as to ᐳ pu and ᐸ pa. Vowel letters do not occur alone, but are carried by a null consonant ⠁
Inuktitut_Braille
Statistical method
it increases the p-value and thus reduces the likelihood of rejecting the null hypothesis when it is true. While widely taught in introductory statistics
Yates's correction for continuity
Yates's_correction_for_continuity
Tree data structure that partitions a 2D area
quadrants or regions. The data associated with a leaf cell varies by application, but the leaf cell represents a "unit of interesting spatial information"
Quadtree
2005 film by Barbara Kopple
Various critics praised Hathaway's performance in the film, with Christopher Null stating that her turn proved "without a doubt that she has been underutilized
Havoc_(2005_film)
Statistical model for a binary dependent variable
to the null model, denoted by ε φ 2 {\displaystyle \varepsilon _{\varphi }^{2}} where the φ {\displaystyle \varphi } subscript denotes the null model.
Logistic_regression
Lobes of far field radiation pattern of antenna
directions where the radiated signal strength reaches a maximum, separated by "nulls", angles at which the radiated signal strength falls to zero. This can be
Sidelobes
Code of behavior for use of the Internet
Machine", Observatorio 2009: 354–356. Google Scholar. Web. 15 Dec. 2010. Null, Christopher "Text Messaging Etiquette: To Text or Not to Text Archived 2012-07-18
Etiquette_in_technology
Flat-sided three-dimensional shape
whether it is orientable or non-orientable by considering a topological cell complex with the same incidences between its vertices, edges, and faces.
Polyhedron
Suborder of fishes
(24): 3941–3949. doi:10.1242/jeb.127340. PMID 26567348. Kajiura, null; Tricas, null (1996). "Seasonal dynamics of dental sexual dimorphism in the Atlantic
Stingray
Statistical significance test
are very unequally distributed among the cells of the table, resulting in the cell counts predicted on the null hypothesis (the "expected values") being
Fisher's_exact_test
Dark cells are specialized nonsensory epithelial cells found on either side of the vestibular organs (the utricle and the ampullae of the semicircular
Dark_cell
Degree of similarity of the alleles in an organism
both complete loss-of-function or 'null' alleles, so homozygous null and nullizygous are synonymous. The mutant cell or organism is called a nullizygote
Zygosity
Alteration in the nucleotide sequence of a genome
or wholly inactivated). When the allele has a complete loss of function (null allele), it is often called an amorph or amorphic mutation in Muller's morphs
Mutation
Blood antigen set classification systems
(ISBT) as systems in the human species where cell-surface antigens—in particular, those on blood cells—are "controlled at a single gene locus or by two
Human_blood_group_systems
Mathematical technique used to solve a certain class of partial differential equations
In plasma physics, the particle-in-cell (PIC) method refers to a technique used to solve a certain class of partial differential equations. In this method
Particle-in-cell
American financier and child sex offender (1953–2019)
know about Jeffrey Epstein, according to key victims' attorney". ABC News. null (December 19, 2025). "Epstein Release Reveals New Photos but Many Files Are
Jeffrey_Epstein
Human protein
suggests that p14ARF can bind to NPM, inhibiting rRNA processing. ARF-null cells have increased nucleolar area, increased ribosome biogenesis, and a corresponding
P14arf
Statistical methods for comparing samples
null hypothesis if | z | > 1.96 {\displaystyle |z|>1.96} (for a two-tailed test). Or, alternatively, by computing the p-value and rejecting the null hypothesis
Two-proportion_Z-test
Pathogenic type of misfolded protein
express PrP on their cell membrane and that hematopoietic tissues with PrP-null stem cells exhibit increased sensitivity to cell depletion. There is some
Prion
Non-coding RNA in the species Homo sapiens
embryos from the over-accumulation of Xist. When one allele of Tsix in mice is null, the inactivation is skewed toward the mutant X chromosome. This is due to
Tsix
Free-living species of nematode
Peres, Tanara V.; Nwoha, Polycarp U.; Aschner, Michael (December 2016). "Null allele mutants of trt-1, the catalytic subunit of telomerase in Caenorhabditis
Caenorhabditis_elegans
Data structure with nodes pointing to the next node
temp->next = NULL; // initialize invalid links to nil. if (!head) { head = temp; // If the linked list is empty (i.e., the head node pointer is a null pointer)
Linked_list
Lewis, J. Raff, M., Roberts, K., Walter, P. 2008. Molecular Biology of the Cell, 5th ed. Garland Science, Taylor & Francis Group, NY, pp 538–539. Kevil,
List of research methods in biology
List_of_research_methods_in_biology
American Christian-drama film series
film was re-titled to God's Not Dead: In God We Trust. Directed by Vance Null, it follows Reverend David "Dave" Hill as he runs for office in a campaign
God's_Not_Dead_(film_series)
liver hemangiomas, and up-regulation of p70S6 kinase activity in Tsc1 null cells". Human Molecular Genetics. 11 (5): 525–34. doi:10.1093/hmg/11.5.525.
Timeline of tuberous sclerosis
Timeline_of_tuberous_sclerosis
Human blood group system
a null mutation of ABCG2 express this phenotype. Homozygosity for certain missense mutations, or heterozygosity for a missense mutation and a null mutation
Junior_blood_group_system
Organ system in vertebrates complementary to the circulatory system
the body. This fluid carries nutrients to the cells and collects waste products, bacteria, and damaged cells, before draining into the lymphatic vessels
Lymphatic_system
Protein-coding gene in the species Homo sapiens
this study examines gene-targeted Entpd2-null mice, globally lacking the NTPDase2 enzyme. The Entpd2-null mice exhibited normal numbers and sizes of
ENTPD2
Cells that form bone tissue
are cells with a single nucleus that synthesize bone. However, in the process of bone formation, osteoblasts function in groups of connected cells. Individual
Osteoblast
Juliane Köhler, Merab Ninidze, Matthias Habich, Sidede Onyulo Drama Won Oscar Null Uhr 12 Bernd Michael Lade Meret Becker, Dieter Landuris [de], Bernd Michael
List of German films of the 2000s
List_of_German_films_of_the_2000s
Protein-coding gene in the species Homo sapiens
an in vivo substrate of ABHD12. Elevated lysoPS production in ABHD12 null cells from PHARC subjects can be reversed using an inhibitor of ABHD16A. In
ABHD12
Text format for tabular data using a comma between fields
not support more complex data relations and makes no distinction between null and empty values, and in applications where these features are needed other
Comma-separated_values
Antenna constructions for different applications
might be called a "partial null" or "incomplete null" or "faded null", as compared to a smaller loop's "sharp", complete nulls (no signal at all). The weak
Antenna_types
team is freed by the Defenders, and the two teams battle the Overmind and Null the Living Darkness. To repair the global chaos wrought by the Overmind,
List of Marvel Comics characters: G
List_of_Marvel_Comics_characters:_G
Genes on human chromosome 6
(HLA) system is a complex of genes on chromosome 6 in humans that encode cell-surface proteins responsible for regulation of the immune system. The HLA
Human_leukocyte_antigen
Rare neurodegenerative disorder
degeneration in SCA1 persons, suggesting a more complicated mechanism. Ataxin-null mice are shown to exhibit reduced motor and spatial learning, suggesting
Spinocerebellar_ataxia_type_1
that the null hypothesis was correct, which can indicate the incompatibility of results with the specific statistical model assumed in the null hypothesis
List of common misconceptions about science, technology, and mathematics
List_of_common_misconceptions_about_science,_technology,_and_mathematics
American filmmaker and author (born 1954)
children and teenagers, directed by Gary Null, a proponent of alternative medicine. In the film Moore agrees with Gary Null that Ritalin and other similar drugs
Michael_Moore
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