title: Comparison of the NH2-Terminal sequences of chick Type I preprocollagen chains synthesized in an nRNA-dependent reticulocyte lysate.
abstract: RNA was extracted from 17-day-old chick embryo calvaria and translated by an mRNA-dependent reticulocyte lysate. Procedures were developed for purifying intact pro alpha 1(I) and pro alpha 2 translation products from the lysate. These products were identified by comparing tryptic peptide elution patterns of the translation products with those obtained from secreted pro alpha chains. Partial sequence data from the amino terminus of each translation product demonstrated that each chain begins with a sequence that is different from that of the corresponding pro alpha chain, and that the two sequences are not the same. Also, the bacterial collagenase-resistant peptide from the amino terminus of prepro alpha 1(I) had an apparent molecular weight which was 10 000 greater than the peptide from pro alpha 1(I).
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002356:Cartilage / Q000032:analysis*; D002642:Chick Embryo; D003094:Collagen; D003012:Microbial Collagenase / Q000378:metabolism; D008970:Molecular Weight; D011347:Procollagen / Q000032:analysis*; D014176:Protein Biosynthesis; D011498:Protein Precursors / Q000032:analysis*; D012333:RNA, Messenger / Q000378:metabolism*; D011817:Rabbits; D012156:Reticulocytes / Q000378:metabolism*; D014357:Trypsin / Q000378:metabolism
chemical_list: D011347:Procollagen; D011498:Protein Precursors; D012333:RNA, Messenger; C032431:preprocollagen; D003094:Collagen; D014357:Trypsin; D003012:Microbial Collagenase