| Sr | Symbol for strontium. (05 Mar 2000) |
|---|---|
| srawls | <botany> Small branches of a tree; twigs; sprays. (10 Mar 1998) |
| src | <molecular biology> The transforming (sarcoma inducing) gene of Rous sarcoma virus. The protein product is pp60vsrc, a cytoplasmic protein with tyrosine specific protein kinase activity, that associates with the cytoplasmic face of the plasma membrane. (12 Jan 1998) |
| src homology domains | Regions of sequence similarity in the src family of cytoplasmic tyrosine kinases. The sh1 domain is a catalytic domain. Sh2 and sh3 domains are protein-binding domains. Sh2 usually binds phosphotyrosine-containing proteins and sh3 interacts with cytoskeletal proteins. (12 Dec 1998) |
| src-family kinases | <enzyme> Family of non-receptor protein-tyrosine kinases homologous to src. They are closely related intracellular enzymes that participate in signal transduction pathways in a variety of haemopoietic cells and especially their surface receptors. Registry number: EC 2.7.1.- (12 Dec 1998) |
| src-related intestinal kinase | <enzyme> An intracellular epithelial cell tyrosine kinase; shares 80% homology with human tyrosine kinase brk; has 451 amino acid residues; amino acid sequence given in first source Registry number: EC 2.7.1.- Synonym: sik protein, sik gene product (26 Jun 1999) |
| SRF | <abbreviation> Somatotropin-releasing factor. (05 Mar 2000) |
| SRF-A | <abbreviation> Slow-reacting factor of anaphylaxis. (05 Mar 2000) |
| SRH | <abbreviation> Somatotropin-releasing hormone. (05 Mar 2000) |
| SRIF | <abbreviation> Somatotropin release-inhibiting factor. (05 Mar 2000) |
| sRNA | <abbreviation> Soluble RNA. See entries under ribonucleic acid. (05 Mar 2000) |
| SRP | <abbreviation> Signal recognition particle. (05 Mar 2000) |
| SRS | <abbreviation> Slow-reacting substance. (05 Mar 2000) |
| srs-a | A group of leukotrienes (ltc4, ltd4, and lte4) that is the major mediator of bronchial constriction and other allergic reactions. Earlier studies had described a "slow-reacting substance of anaphylaxis" released from guinea pig and cat lung by cobra venom, and in guinea pig lung after anaphylactic shock. The relationship between srs-a and members of the leukotriene family was established following publication of the uv spectrum of purified srs-a, that showed the presence of the conjugated triene. (12 Dec 1998) |