| lecture notes | Notes taken at the delivery or reading of a speech before an audience or class, usually given to instruct. (12 Dec 1998) |
|---|---|
| rec A protein | <protein> A protein (40 kD) product of the rec (recombination) gene, that catalyses the pairing of a single stranded piece of DNA with its complementary sequence, displacing a loop of single stranded DNA (D loop). It catalyses the ATP-driven exchange of DNA strands in genetic recombination. The product of the reaction consists of a duplex and a displaced single-stranded loop which has the shape of the letter d and is therefore called a d-loop structure. ATP is hydrolyzed to ADP during the reaction; also has proteolytic activity. (22 Sep 2002) |
| rec B protein | <protein> Protein (140 kD), one subunit of nuclease that unwinds double stranded DNA and fragments the strands sequentially, the other subunit is recC (128 kD) (18 Nov 1997) |
| sudan | A republic in eastern africa, south of egypt and west of ethiopia. Its capital is khartoum. It was under egypt 1820-82, then jointly administered by egypt and great britain after 1899 as the anglo-egyptian sudan. It gained independence in 1956. The name is of arabic origin, balad as-sudan: bal (land) + al (as) (the) + sudan (black), the land of the blacks, the name given originally by arabian travelers. (12 Dec 1998) |
| Sudan black B | A diazo dye, C29H24N6, used as a stain for fats. (05 Mar 2000) |
| Sudan brown | A brown stain, (C10H7)N==N(C10H6)OH, derived from alpha-naphthylamine and used as a stain for fats. (05 Mar 2000) |
| 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 IV | O-Tolylazo-o-tolylazo-beta-naphthol. An azo dye; a dark, brownish red powder, soluble in oils, fats, and chloroform, but insoluble in water; used in medicine as a vulnerary, in histology to stain fat in tissue sections and basic proteins at high pH, and in immunoelectrophoresis. Synonym: Biebrich scarlet red, medicinal scarlet red, scharlach red, Sudan IV. (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) |
| Sudan stain | <chemical, investigation> Histochemical stains used for lipids. (18 Nov 1997) |
| Sudan yellow | Metadioxyazobenzene;a yellow stain for fats. (05 Mar 2000) |