Cytoplasmic Distributions of Two Distinct Classes of Newly Synthesized Poly(A)-Containing RNA in Sea Urchin Embryos

概要

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In the Japanese sea urchin, Hemicentrotus pulcherrimus, newly synthesized cytoplasmic poly(A)R^+RNA contained onlya short poly(A) tract of about 30 nucleotides in average size at the mid-cleavage stage. In mesenchyme blastula and prism larva, newly synthesized cytoplasmic RNA involved two distinct classes of poly(A)R^+RNA. One contained a short poly(A) tract similar to that found at the mid-cleavage stage and the other, being about 30% of the total newly synthesized cytoplasmic poly(A)R^+RNA, contained a long poly(A) tract having 160 nucleotides on the average. While nearly all of the long poly(A)-containing RNA was found in the 105,000 × g pellet, 12-24% of the short poly(A)-containing RNA was found in the 105,000 × g supernstant at each of the three stages examined.
社団法人日本動物学会の論文
1983-06-25