| tat | <protein> An HIV protein that helps produce new complete HIV RNA genomes (see), and ultimately new virus, from the HIV DNA genetic template present in infected cells. Tat may also be involved in: 1) the reactivation of other latent viruses in people with AIDS, such as JC virus, the cause of PML, 2) the development of AIDS-related KS by stimulating the formation of new blood vessels, and 3) the triggering of anergy and apoptosis in CD4 cells. (16 Dec 1997) |
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| Tat protein | <molecular biology> Transactivator protein from lentiviruses, notably HIV. Sequence specific RNA binding proteins that recognise TAR RNA. Peptides from this protein are potent neurotoxins, implying a possible route for HIV mediated toxicity. (18 Nov 1997) |
| tat-associated kinase | <enzyme> Abbreviated tak; binds to activation domain of tat Registry number: EC 2.7.1.- Synonym: p-tefb, positive transcriptional elongation factor b (26 Jun 1999) |
| TATA box | <molecular biology> A consensus sequence found in the promoter region of most genes transcribed by eukaryotic RNA polymerase II. Found about 25 nucleotides before the site of initiation of transcription and has the consensus sequence: 5' TATAAAA 3'. This sequence seems to be important in determining accurately the position at which transcription is initiated. (18 Nov 1997) |
| tataupa | <zoology> A South American tinamou (Crypturus tataupa). Origin: From the native name. Source: Websters Dictionary (01 Mar 1998) |
| tatou | <zoology> The giant armadillo (Priodontes gigas) of tropical South America. It becomes nearly five feet long including the tail. It is noted for its burrowing powers, feeds largely upon dead animals, and sometimes invades human graves. Origin: Cf. Tatouay. Source: Websters Dictionary (01 Mar 1998) |
| tatouay | <zoology> An armadillo (Xenurus unicinctus), native of the tropical parts of South America. It has about thirteen movable bands composed of small, nearly square, scales. The head is long; the tail is round and tapered, and nearly destitute of scales; the claws of the fore feet are very large. Synonym: tatouary, and broad-banded armadillo. Origin: Of Brazilian origin; cf. Pg. Tatu, F. Tatou. Source: Websters Dictionary (01 Mar 1998) |
| tatouhou | <zoology> The peba. Origin: Cf. Tatouay. Source: Websters Dictionary (01 Mar 1998) |
| tattler | 1. One who tattles; an idle talker; one who tells tales. 2. <zoology> Any one of several species of large, long-legged sandpipers belonging to the genus Totanus. The common American species are the greater tattler, or telltale (T. Melanoleucus), the smaller tattler, or lesser yellowlegs (T. Flavipes), the solitary tattler (T. Solitarius), and the semipalmated tattler, or willet. The first two are Synonym: telltale, telltale spine, telltale tattler, yellowlegs, yellowshanks, and yelper. Source: Websters Dictionary (01 Mar 1998) |
| tattoo | An indelible mark or figure made by puncturing the skin and introducing some pigment into the punctures; a mode of ornamentation practiced by various barbarous races, both in ancient and modern times, and also by some among civilized nations, especially by sailors. Source: Websters Dictionary (01 Mar 1998) |
| tattooing | The insertion of permanent colours in the skin by introducing them through punctures. Tattooing of the cornea is the permanent colouring of the cornea chiefly to conceal leukomatous spots. (12 Dec 1998) |
| tatu | <zoology> Same as Tatou. Source: Websters Dictionary (01 Mar 1998) |
| tatusiid | <zoology> Any armadillo of the family Tatusiidae, of which the peba and mule armadillo are examples. Also used adjectively. Source: Websters Dictionary (01 Mar 1998) |
| gene products, tat | Trans-acting transcription factors. Nuclear proteins whose expression is required for HIV viral replication. The tat protein stimulates HIV-ltr-driven RNA synthesis for both viral regulatory and viral structural proteins. Tat stands for trans-activation of transcription. (12 Dec 1998) |
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| genes, tat | DNA sequences that form the coding region for the protein responsible for trans-activation of transcription (tat) in human immunodeficiency virus (HIV). (12 Dec 1998) |