| 释义 |
leucosin, n. Biochem.|ˈl(j)uːkə(ʊ)sɪn|
Also leukosin.
[f. Gr. λευκός white + -in1, after G. Leucosin, Leukosin.]
1. An albumin found in some cereal grains.
1894Osborne & Voorhees in Jrnl. Amer. Chem. Soc. XVI. 528 Leucosin, an albumin,..was found to form between 0.3 and 0.4 per cent of the wheat kernel. 1907T. B. Osborne Proteins of Wheat Kernel 114 Leucosin resembles the animal proteins in ultimate composition. 1963E. G. Young in Florkin & Stotz Comprehensive Biochem. VII. i. i. 6 The albumins which have been most carefully characterized are ovalbumin and conalbumin of egg white..leucosin of cereals, myoalbumin and the myogens of muscle.
2. A polysaccharide occurring in food storage vesicles in some of the golden algae, now regarded as related to laminaran.
1914Archiv für Protistenkunde XXXII. 251 In solutions containing sugar the leukosin body is conspicuously large... Owing to its ready solubility leukosin is often not present in fixed and stained material. It seems possible that it is a form of sugar. 1928Funk's Stand. Dict., Leucosin. 1955G. M. Smith Cryptogamic Bot. (ed. 2) v. 168 Oil is the chief food reserve accumulated in protoplasts of Xanthophyceae, but leucosin, an insoluble white substance, is also a rather widely distributed food reserve. 1965Jrnl. Chem. Soc. 7036 The food reserve polysaccharide of the Chrysophyta..has been given different names in the different classes, but it appears that leucosin, volutin, and chromatin are the same substance. 1983Plant Physiol. LXXIII. 418 Leucosin is a polysaccharide composed of β-(1→3)-linked d-glucose residues. |