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T

T2 virus
[gene mapping] [Hershey-Chase experiment]
T4 virus
[rII locus]
TACO (tryptophan-aspartate coat protein)
Taenia solium
Taiga
TALENs (Transcription Activator-Like Effector Nucleases)
Tanning
TAP = Transporter associated with antigen processing
Tapeworms
Taste, in humans
TATA box
Tatum, E. L.
Taxes
Taxol
Taxonomy
Classification of organisms. [Discussion]
Tay-Sachs disease
TBP (TATA-binding protein)
TCDD (dioxin)
T cell
Lymphocyte that matures within the thymus. [Discussion] [CD4+ subset] [CD8+ subset] [Helper subsets (Th1, Th2, Tfh, Th17)] [Cytotoxic T Lymphocytes (CTL)] [Regulatory T cells] [Gamma/Delta T cells]
TCR
T-cell receptor for antigen. [More] [gene segments]
Telomerase
[and replicative senescence]
Telomeres
Temperate
[deciduous forest] [rain forest]
Tendon
Teratocarcinoma
Teratogen
A substance that causes birth defects.
Teratoma
Tertiary structure, of protein
Tesla
Test cross
[monohybrid] [dihybrid]
Testes, human
Testosterone
Tetanus
Sustained maximal contraction of a muscle. [More]
Tetracycline antibiotics
Tetracycline response element
Tetrad
(1) The duplicated homologous chromosomes held together by chiasmata prior to anaphase of meiosis I. [View] Each tetrad contains four chromatids. (2) The four products of meiosis kept together like the four spores in the ascus of budding yeast. [View]
Tetrahymena thermophila
Tetraparental mouse
Tetrapods
TFIID (Transcription factor IID)
Thalamus
Thalassemia
THC (delta-9-tetrahydrocannabinol)
Thecodonts
Thelytoky, automictic
Therapsids
Thermoacidophiles
Thiamine (vitamin B1)
Thick (and thin) filaments of muscle
Thoracic duct
Three-point cross
[in corn (maize)] [in T2 bacteriophage]
Threonine
Threshold
[of response to toxic agents] [of neurons] [of skeletal muscle]
Thrombin
Thrombocytopenic purpura, immune
Thrombomodulin
Thrombopoietin
Thromboxanes (TXs)
Thylakoid
[structure] [and light reactions]
Thymidine kinase
Thymine
Thymus
[function]
Thyroid gland
Thyroid-stimulating hormone (TSH)
Thyrotoxicosis (Graves' disease)
Thyrotropin-releasing hormone (TRH)
Tight Junctions
Timeless (tim) gene
Tinbergen, N.
Tissue
Association of cells bound together by cell walls (plants) or extracellular matrix (animals) that performs particular functions. [plant tissues] [animal tissues]
Tissue Factor (TF)
Tissue plasminogen activator (TPA)
Tissue typing
Titer
Titin
Tocopherol (vitamin E)
Tolerance, immunological
Toll-Like Receptors (TLRs)
Tonus
Sustained, partial contraction of a muscle. [More]
TOR ("target of rapamycin")
Torr
A unit of pressure equal to that exerted by a column of mercury 1 mm high; hence equal to the unit mm Hg.
Total fertility rate (TFR)
Touch, sense of
Toxic shock syndrome
Toxin
Metabolic product (usually a protein) of an organism that is poisonous to another organism.
Toxoid
Toxin treated to destroy its poisonous quality but leaves it capable of stimulating the production of antibodies that will be able to bind to the unaltered toxin. The DTP vaccine contains both diphtheria and tetanus toxoid.
Toxoplasma gondii
Tracheal system of insects
Tracheophyte
A plant with a vascular system of xylem and phloem. Includes all plants except mosses and their relatives.
Tranquilizers
Transcription
The synthesis of a sequence of ribonucleotides complementary to the sequence of deoxyribonucleotides in a molecule of DNA. [Discussion]
Transcription factor
A protein needed to initiate the transcription of a gene. Some transcription factors bind to specific sequences of DNA (promoters and enhancers); others bind to each other; many bind both to DNA as well as to other transcription factors.
[general discussion] [selector genes] [glucocorticoid receptor] [jun,fos,myc] [E2F] [TFIIH] [isolating transcription factors by affinity chromatography]
Transcriptome
Transducin
Transduction
Trans fatty acids
Transformation
1. The modification of the genotype of a cell by introduction of DNA from another source. [Discussion]
2. The conversion of a normal cell into a cancerous one. [Discussion]
Transforming Growth Factor-β
Transgenic
An animal or plant that has been deliberately transformed with a foreign gene and is able to pass that gene on to future generations in its gametes. [making transgenic animals] [making transgenic plants]
Transitions (in DNA)
Translation
The synthesis of a polypeptide in accordance with the genetic information encoded in a molecule of messenger RNA (mRNA). [Discussion]
Translocation
(1) Transfer of a piece of one chromosome to another, nonhomologous, chromosome. [More] [Example: Philadelphia chromosome]
(2) Transport of proteins in (and out) of the endoplasmic reticulum.
(3) Transport of materials, e.g., water and food, from one part of a plant to another.
Transmembrane protein
Protein that passes one or more times through the lipid bilayer of a cell membrane. [color schematic (48K)]
Transmissible spongiform encephalopathies
Transpiration
Transpiration-Pull
Transplantation
[ discussion of organ and tissue transplantation ] [ transplants of hematopoietic stem cells ]
Transport vesicle
Membrane-enclosed structure that shuttles soluble as well as integral membrane proteins to various destinations within the cell. [More]
Transposons
Transversions (in DNA)
Trematoda
Tricyclic antidepressants
Triglyceride
Trihalomethanes (THMs) (by-products of water chlorination)
Trilinolein
Trinucleotide repeats
Trisomy 21
Tristearin
Trochophore larva
Trophic level
Trophoblast
Tropical rain forest biome
Tropisms
Troponin and Tropomyosin
TRPV receptors
Trypanosomiasis (African sleeping sickness)
[how the parasite evades the immune response]
Trypsin
Tryptophan
[structure] [repressor]
TSH
Thyroid-stimulating hormone
T system
Tubular secretion
Tubulin
Tularemia
Tumor-infiltrating lymphocytes (TIL)
Tumor necrosis factors (TNF)
[and inflammation] [and apoptosis] [TNF-β (lymphotoxin)] [TNF-α receptors]
Tumor suppressor genes
Tundra biome
Tunicata (Urochordata)
Turbellaria
Turgor
[in guard cells of leaf]
Turner syndrome
Two-hybrid system
Tyrosine
Tyrosine kinases
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