| HTL | hamster tumor line; hearing threshold level; high-L-leucine transport; histotechnologist; human T-ce... |
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| HTR | histidine transport regulator; 5-hydroxytryptamine receptor |
| IVOTTS | Irvine viable organ-tissue transport system |
| LEUT | leucine transport |
| LSTAT | life support for trauma and transport |
| vitamin d-binding protein | An alpha-globulin found in the plasma of man and other vertebrates. It is apparently synthesised in the liver and carries vitamin d and its metabolites through the circulation and mediates the response of tissue. It is also known as group-specific component (gc). Gc subtypes are used to determine specific phenotypes and gene frequencies. These data are employed in the classification of population groups, paternity investigations, and in forensic medicine. (12 Dec 1998) |
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| cellular retinoic acid binding protein | <protein> A cytoplasmic fatty acid binding protein that acts as an initial receptor for the putative morphogen, retinoic acid. (18 Nov 1997) |
| glucose related protein | <protein> One of the stress related proteins: identical to endoplasmin. (18 Nov 1997) |
| rep protein | <protein> A protein that triggers a plasmid's replication. An acronym for Repetitive Extragenic Palindromicprotein, this protein is an enzyme produced by a mutant strain of E. Coli that unwinds the DNA helix. (09 Oct 1997) |
| repressor protein | <molecular biology> A protein that binds to an operator of a gene preventing the transcription of the gene. The binding affinity of repressors for the operator may be affected by other molecules. Inducers bind to repressors and decrease their binding to the operator, while co repressors increase the binding. The paradigm of repressor proteins is the lactose repressor protein that acts on the lac operon and for which the inducers are _ galactosides such as lactose, it is a polypeptide of 360 amino acids that is active as a tetramer. Other examples are the lambda repressor protein of lambda bacteriophage that prevents the transcription of the genes required for the lytic cycle leading to lysogeny and the cro protein, also of lambda, which represses the transcription of the lambda repressor protein establishing the lytic cycle. Both of these are active as dimers and have a common structural feature the helix turn helix motif that is thought to bind to DNA with the helices fitting into adjacent major grooves. (18 Nov 1997) |
| VLA protein | <protein> VLA 1 and VLA 2 were originally defined as antigens appearing on the surfaces of T lymphocytes 2-4 weeks after in vitro activation, they are now know to be part of the _ integrin family. Additional members of the subset are now known (VLA 3, VLA 4, VLA 5 and VLA 6), the _ subunits all being identical. Some of the VLA proteins are receptors for collagen, laminin or fibronectin and many are now known to be expressed on cells other than leucocytes. (18 Nov 1997) |
| pelle-like protein kinase | <enzyme> Mplk - mouse pelle-like kinase; mammalian homolog of drosophila pelle protein; expression is developmentally regulated and is greatest in liver; genbank l08476 Registry number: EC 2.7.10.- Synonym: mplk (protein) (26 Jun 1999) |
| ceramide-activated protein kinase | <enzyme> Mw 97 kD; stimulation of kinase takes place during sphingomyelin pathway; has membrane-bound activity capable of phosphorylating a peptide derived from the sequence surrounding thr(699) of the epidermal growth factor receptor; has role in signal transduction for tumour necrosis factor Registry number: EC 2.7.10.- Synonym: cap kinase (26 Jun 1999) |
| ceramide-activated protein phosphatase | <enzyme> Belongs to the heterotrimeric subfamily of the pp2a group of serine-threonine protein phosphatases; involved in ceramide-mediated signal transduction; inhibited by okadaic acid Registry number: EC 3.1.3.- Synonym: ceramide-stimulated phosphatase, capp (enzyme) (26 Jun 1999) |
| Vps15 protein kinase | <enzyme> Functions with vps34p as a membrane-associated complex which facilitates the delivery of proteins into the vacuole in yeast; amino acid sequence has been determined Registry number: EC 2.7.10.- Synonym: vps15 gene product, vps15p (26 Jun 1999) |
| retinoblastoma protein | <molecular biology, protein> Product of the retinoblastoma tumour suppressor gene. It is a nuclear phosphoprotein hypothesised to normally act as an inhibitor of cell proliferation. Rb protein is absent in retinoblastoma cell lines. It also has been shown to form complexes with the adenovirus e1a protein, the sv40 t antigen, and the human papilloma virus e7 protein. (03 Jul 1999) |
| retinol-binding protein | <molecular biology> Proteins which bind with retinol. The retinol-binding protein found in plasma has an alpha-1 mobility on electrophoresis and a molecular weight of 21,000-22,000. The protein has one binding site for retinol and is responsible for the transport of vitamin A. The retinol- protein complex (molecular weight 80,000 to 90,000) circulates in plasma in the form of a protein-protein complex with prealbumin. The retinol-binding protein found in tissue has a molecular weight of 14,000 and carries retinol as a non-covalently-bound ligand. (03 Jul 1999) |
| PEP protein tyrosine phosphatase | <enzyme> Pest - pro, glu, ser and thr; an intracellular ptpase expressed primarily by cells of haematopoietic origin; involved in regulating nuclear tyrosine phosphorylation; amino acid sequence has been determined Registry number: EC 3.1.3.- Synonym: pep ptpase, pest-enriched phosphatase, ptp-pest (26 Jun 1999) |
| membrane protein | <protein> A protein with regions permanently attached to a membrane (peripheral membrane protein) or inserted into a membrane integral membrane protein). Insertion into a membrane implies hydrophobic domains in the protein. All transport proteins are integral membrane proteins. (18 Nov 1997) |
| channel protein | <chemistry, physiology> A protein that facilitates the diffusion of molecules/ions across lipid membranes by forming a hydrophilic pore. most frequently multimeric with the pore formed by subunit interactions. (18 Nov 1997) |