title: Size of poly (A) +-mRNA in Saccharomyces cerevisiae polysomes.
abstract: The size of poly (A) +-mRNA in different classes of yeast polysomes is estimated. The average molecular weight of long-term labelled polysomal poly (A) +-mRNA is about 0,65 x 10(6) daltons. Approximately 60% of the poly (A) +-mRNA polynucleotide chains located at the 5' end, are unprotected by ribosomes and degraded by nucleases upon incubation of cell lysates, to yield a population of poly (A) +-mRNA with an average molecular weight of 0,25 x 10(6) daltons.
mesh_terms: D008970:Molecular Weight; D011061:Poly A / Q000032:analysis; D011132:Polyribosomes / Q000032:analysis; D012333:RNA, Messenger / Q000032:analysis*; D012260:Ribonucleases / Q000378:metabolism; D012441:Saccharomyces cerevisiae / Q000032:analysis*; D013347:Subcellular Fractions
chemical_list: D012333:RNA, Messenger; D011061:Poly A; D012260:Ribonucleases