| 3-phenylserine dehydratase | <enzyme> Catalyses deamination of l-threo-3-phenylserine to yield phenylpyruvate and ammonia; partial amino acid sequence given in first source Registry number: EC 4.2.1.- Synonym: l-threo-phenylserine dehydratase (26 Jun 1999) |
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| 3-phosphohistidine 6-phospholysine phosphatase | <enzyme> Mw 150 kD; hydrolyzes not only 6-phospholysine but also 3-phosphohistidine and compounds containing an oxygen-phosphorus (o-p) bond; do not confuse with 6-phospholysine phosphatase (mw 30 kD) which hydrolyzes only 6-phospholysine Registry number: EC 3.1.3.- Synonym: phlpase, p-his p-lys phosphatase, 6-phospholysine 3-phosphohistidine phosphatase (26 Jun 1999) |
| 3-phosphoinositide-dependent protein kinase | <enzyme> Enzyme from rabbit skeletal muscle phosphorylates protein kinase b at thr308; activated by phosphatidylinositol 3,4,5-trisphosphate or phosphatidylinositol 3,4-bisphosphate Registry number: EC 2.7.10.- Synonym: pdk1 enzyme, ptdins(3,4,5)p3-dependent protein kinase-1 (26 Jun 1999) |
| 3-phosphoshikimate 1-carboxyvinyltransferase | <enzyme> Shikimic acid 5-p plus phosphoenolpyruvate yields 3-enolpyruvyl shikimic acid 5-phosphate; aroa gene encodes epsp synthase Registry number: EC 2.5.1.19 Synonym: 5-enolpyruvylshikimic acid-3-phosphate synthase, epsp synthase, 5-enolpyruvylshikimate-3-phosphate synthase, aroa protein, aroa gene product, 3-enolpyruvyl shikimic acid 5-phosphate synthetase (26 Jun 1999) |
| 3-sulfoalanine | <chemical> Beta-sulfoalanine. An amino acid with a c-terminal sulfonic acid group which has been isolated from human hair oxidised with permanganate. It occurs normally in the outer part of the sheep's fleece, where the wool is exposed to light and weather. Chemical name: Alanine, 3-sulfo- (12 Dec 1998) |
| 3-sulfogalactosylceramide | A sulfatide that accumulates in individuals with metachromatic leukodystrophy. (05 Mar 2000) |
| 3-ureidohydantoin | <pharmacology> Any of many nitrogen-containing organic compounds which are found in some plants and in the urine of some mammals. Allantoin is used to treat wounds and ulcers. (09 Oct 1997) |
| 3-ureidoisobutyric acid | H2NCONH-CH2CH(CH3)COOH;an intermediate in thymine catabolism. (05 Mar 2000) |
| 3-ureidopropionic acid | H2NCONH-CH2CH2COOH;an intermediate in uracil catabolism. (05 Mar 2000) |
| 3.613 helix | The helical (commonly right-handed) form present in many proteins, deduced by Pauling and Corey from X-ray diffraction studies of proteins such as alpha-keratin; the helix is stabilised by hydrogen bonds between, e.g., ==C==O and HN== groups (symbolised by the centre dot in ==CO-HN==) of different eupeptide bonds. In a true a helix, there are 3.6 amino acid residues per turn of the helix. Synonym: 3.613 helix, Pauling-Corey helix. Collagen helix, an extended left-handed helix resulting from the high levels of glycine, l-proline, and l-hydroxyproline present in the collagens. There are 3.3 amino acids per turn of the helix. Three of those left-handed helices form a triple superhelix that is right-handed. (05 Mar 2000) |
| 3a-hydroxy-5a-pregnan-20-one | A catabolite of progesterone; found in the urine of pregnant women. (05 Mar 2000) |
| 3alpha-hydroxyglycyrrhetinate dehydrogenase | <enzyme> Converts 3-ketoglycyrrhetic acid to 3alpha-hydroxyglycyrrhetic acid; shows absolute specificity for the 3alpha-hydroxyl and 3-ketonic groups of 18alpha or 18beta-glycyrrhetic acid; required nadp+ and NADPH as co substrates; isolated from clostridium innocuum Registry number: EC 1.1.1.230 Synonym: glycyrrhetinate dehydrogenase (26 Jun 1999) |
| 3b-coprostanol | 5b-cholastan-3b-ol;the main sterol of the faeces produced by the reduction of cholesterol by intestinal bacteria. For structure of coprostane and cholestane, see steroids. Synonym: 3b-coprostanol, coprosterin, stercorin. (05 Mar 2000) |
| 3b-hydroxysteroid sulfate sulfatase | <enzyme> An enzyme, found in most mammalian tissues, that is capable of hydrolyzing the sulfate ester bonds of a variety of sulfated sterols; a deficiency of this enzyme will result in X-linked ichthyosis. (05 Mar 2000) |
| 3He | Symbols for helium-3. (05 Mar 2000) |