Cellular content and biosynthesis of polyamines during rooster spermatogenesis
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چکیده
منابع مشابه
Cellular content and biosynthesis of polyamines during rooster spermatogenesis.
The natural polyamines spermine and spermidine, and the diamine putrescine, were extracted from rooster testis cells separated by sedimentation at unit gravity, and from vas-deferens spermatozoa. The ratios spermine/DNA and spermidine/DNA were kept relatively constant throughout spermatogenesis, whereas the ratio putrescine/DNA rose in elongated spermatids. The cellular content of spermine, spe...
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The growth rate of several polyamine-deficient mutants of Escherichia coli was very low in minimal medium and increased markedly upon the addition of putrescine, spermidine, arginine, citrulline, or argininosuccinic acid. The endogenous content of polyamines was not significantly altered by the supplementation of polyamine-starved cultures with arginine or its precursors. In contrast, these com...
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ژورنال
عنوان ژورنال: Biochemical Journal
سال: 1982
ISSN: 0306-3283
DOI: 10.1042/bj2080269