| processus styloideus ossis metacarpalis III | A pointed projection from the dorsolateral angle of the base of the third metacarpal bone; it sometimes exists as a separate ossicle. Synonym: processus styloideus ossis metacarpalis III. (05 Mar 2000) |
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| protoporphyrinogen type III | The immediate precursor of protoporphyrin III in haem biosynthesis; elevated in cases of variegate porphyria. (05 Mar 2000) |
| protoporphyrinogen type III oxidase | A mitochondrial enzyme that uses O2 to convert protoporphyrinogen type III to protoporphyrin type III in haem biosynthesis; a deficiency of this enzyme is associated with variegate porphyria. (05 Mar 2000) |
| protoporphyrin type III | 2,7,12,18-Tetramethyl-3,8-divinylporphin-13,17dipropionic acid;the principal protoporphyrin found in nature (one of 15 possible isomers), characterised by the presence of 4 methyl groups, 2 vinyl groups, and 2 propionic acid side chains; a porphyrin derivative that, with iron, forms the haem of haemoglobin and the prosthetic groups of myoglobin, catalase, cytochromes, etc. (05 Mar 2000) |
| Hind III | <enzyme, molecular biology> Commonly used type II restriction endonuclease isolated from Haemophilus influenzae, it cleaves the sequence AAGCTT between the two As thus generating sticky ends. (18 Nov 1997) |
| HTLV-III | <abbreviation> Human T-cell lymphotropic virus type III. See: human immunodeficiency virus. (05 Mar 2000) |
| hyperlipoproteinaemia type III | A rather uncommon form of familial hyperlipaemia characterised by the presence of lipoproteins of abnormal composition. The main abnormal lipoproteins are called beta-vldl and have a different apoprotein content and a higher proportion of cholesterol relative to triglyceride than normal vldl. (12 Dec 1998) |
| NADH-Fe(III)EDTA oxidoreductase | <enzyme> From cryptococcus albidus; catalyses the formation of nad+ and fe(ii)edta from NADH and fe(iii)edta; forms ethylene from 2-oxo-4-methylthiobutyric acid Registry number: EC 1.6.99.- (26 Jun 1999) |
| Sudan III | A red stain, (C6H5)N==N(C6H4)N==N(C10H6)OH, used for neutral fat in histologic technique; it also stains the fatty envelope of the tubercle bacillus. Synonym: Sudan red III. (05 Mar 2000) |
| Sudan red III | A red stain, (C6H5)N==N(C6H4)N==N(C10H6)OH, used for neutral fat in histologic technique; it also stains the fatty envelope of the tubercle bacillus. Synonym: Sudan red III. (05 Mar 2000) |
| deoxyribonucleases, type III site-specific | <enzyme> Enzyme systems composed of two subunits and requiring ATP and magnesium for endonucleolytic activity; they do not function as atpases. They exist as complexes with modification methylases of similar specificity. The systems recognise specific short DNA sequences and cleave a short distance, about 24 to 27 bases, away from the recognition sequence to give specific double-stranded fragments with terminal 5'-phosphates. Enzymes from different microorganisms with the same specificity are called isoschizomers. Registry number: EC 3.1.21.5 (12 Dec 1998) |
| DNA polymerase III | <enzyme> An enzyme that aids in DNA replication. It has a number of different functions, such as: proofreading newly replicated DNA, removing nucleotides from the 3' end of the strand one by one, and binding nucleotides from the 5' end of the strand. (09 Oct 1997) |
| ductus pharyngobranchialis III | A narrow communication between the third branchial pouch and the pharynx in the embryo. (05 Mar 2000) |
| type III acrocephalosyndactyly | An autosomal dominant syndrome with variable expression of brachycephaly, maxillary hypoplasia, prominent ear crus, syndactyly, facial asymmetry, shallow orbits, telecanthus, and nasal septal deviation; may show mental retardation. Synonym: Saethre-Chotzen syndrome. (05 Mar 2000) |
| type III collagen | Collagen characteristic of reticular fibres. (05 Mar 2000) |