| 释义 |
ribo- Biochem.|ˈraɪbəʊ|
Comb. form of ribose: ˌribohomoˈpolymer [homopolymer s.v. homo-], a polymer of any one of the ribonucleosides; riboˈnuclease [nuclease], any enzyme which catalyses the hydrolysis of RNA into oligonucleotides and smaller molecules; ˌribonucleoˈprotein [nucleoprotein], a combination of a protein with RNA; riboˈnucleoside, a nucleoside containing ribose; riboˈnucleotide, a nucleotide containing ribose. Also riboflavin, ribonucleic a.
1971Nature 23 July 254/1 It seems probable that both the ribohomopolymers and the natural ribonucleic acids do catalyse a reaction in vitro. 1975Ibid. 25 Sept. 327/2 Enzymatic activities for synthesising four ribohomopolymers, including poly(G), have been found in rat liver, and all are stimulated by RNA.
1938Dubos & Thompson in Jrnl. Biol. Chem. CXXIV. 502 The ribonuclease used in the following experiments was extracted from a commercial preparation of dried pancreatin. 1946Nature 27 July 129/2 Many enzymes are not specific as to substrate; but ribonuclease, a depolymerase, is highly specific for ribonucleic acid. 1971J. Z. Young Introd. Study Man xxvi. 372 Haldane noted that ribonuclease is the smallest known enzyme, containing 124 amino-acid residues.
1940Science 18 Oct. 361/1 The virus of equine encephalomyelitis (Eastern strain) is a complex of high molecular weight consisting of phospholipids, cholesterol, fatty acid and ribonucleoprotein. 1968A. White et al. Princ. Biochem. (ed. 4) ix. 204 Since that time, many additional plant viruses have been isolated as crystalline substances, and they are all ribonucleoproteins. 1974D. & M. Webster Compar. Vertebr. Morphol. ix. 182 The perikaryon [of a neuron] contains..the same organelles found in most cells. However, it has a far greater concentration of densely folded, rough endoplasmic reticulum (ribonucleoprotein).
1931Levene & Bass Nucleic Acids vi. 129 A fifth ribonucleoside was discovered by Benedict and his coworkers. 1968A. White et al. Princ. Biochem. (ed. 4) xxix. 667 Synthesis of RNA occurs only when all four ribonucleoside triphosphates are present.
1929Jrnl. Biol. Chem. LXXXI. 215 There occur in nature ribonucleotides of two types. 1959Ibid. CCXXXIV. 2351/1 Studies designed to elucidate the mechanism by which ribonucleotides are converted into deoxynucleotides in extracts of Escherichia coli. 1970R. W. McGilvery Biochem. xx. 473 The deoxyguanosine and deoxyadenosine nucleotides required for synthesis of DNA are formed by reduction of the corresponding ribonucleotides. |