| 单词 |
proteinoid |
| 释义 |
proteinoid, n. (a.) Biochem.|ˈprəʊtiːnɔɪd|
[f. protein + -oid.]
A protein-like polypeptide or mixture of polypeptides obtained by heating a mixture of amino-acids. Also attrib. or as adj.
1956S. W. Fox in Amer. Scientist XLIV. 353 Evidence that proteinoids can be formed by heating one or two amino acids has now accumulated. Ibid. 354 The appearance of aspartic acid after hydrolysis is part of the evidence for a proteinoid product. 1968New Scientist 4 Apr. 41/1 When Sidney Fox first discovered this form of amino acid condensation ten years ago, he was immediately attracted by the idea that these quasi-proteins—or proteinoids,..might represent the first evolutionary step..that led to the true proteins. Ibid. 41/2 Perhaps the most striking similarity that proteinoids bear to true proteins..is that..they act like enzymes. 1971Nature 7 May 42/1 In contrast to the plausible explanations for proteinoid formation, there seems to be no satisfactory concept for the genesis of polynucleotide templates in the presumed conditions of the primitive Earth. 1977A. Hallam Planet Earth 236 (caption) Cell-like structures called ‘proteinoid microspheres’ have been produced by evaporating organic chemicals on hot lava beds. |
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