title: Isolation and characterization of a 15-kilobase genomic sequence coding for part of the Pro alpha 2 chain of sheep type I collagen.
abstract: DNA fragments, prepared by partial Eco RI digestion of fetal sheep liver genomic DNA, were used to prepare a "library" of amplified genomic sequences with the lambda vector Charon 4A. Several recombinant plaques were identified by their ability to hybridize to 32P-labeled cDNA prepared from fetal sheep tendon type I procollagen mRNA. Two of these recombinant DNA bacteriophages (SpC3 and SpC7) were identified as containing procollagen pro alpha 2 gene sequences by their ability to specifically anneal to procollagen pro alpha 2 mRNA. Restriction endonuclease and hybridization to a cloned pro alpha 2 cDNA demonstrated that approximately half (2.5 kilobases) of the pro alpha 2 mRNA sequence is distributed over 15 kilobases of genomic DNA. Restriction maps of SpC3 and SpC7 demonstrated that these two DNA fragments contain overlapping sequences of the pro alpha 2 gene. Electron microscopy and R-loop analysis of SpC3 revealed that at least 12 to 16 intervening sequences are distributed throughout the length of this gene fragment.
mesh_terms: D000818:Animals; D010582:Bacteriophage lambda / Q000378:metabolism; D001483:Base Sequence; D003001:Cloning, Molecular; D003094:Collagen / Q000096:biosynthesis*; D004247:DNA / Q000302:isolation & purification / Q000378:metabolism; D004262:DNA Restriction Enzymes; D004274:DNA, Recombinant / Q000378:metabolism; D005796:Genes; D008970:Molecular Weight; D011347:Procollagen / Q000096:biosynthesis; D014176:Protein Biosynthesis; D012333:RNA, Messenger / Q000302:isolation & purification / Q000378:metabolism; D012756:Sheep; D014158:Transcription, Genetic
chemical_list: D004274:DNA, Recombinant; D011347:Procollagen; D012333:RNA, Messenger; D003094:Collagen; D004247:DNA; D004262:DNA Restriction Enzymes