PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 12068373-10 2002 Although CFTR exon 9 in sheep is preceded by a long polypyrimidine tract (Y(14)), it skips exon 9 in vivo and has a nonconsensus downstream 5" splice site identical to that in humans. polypyrimidine 52-66 cystic fibrosis transmembrane conductance regulator Ovis aries 9-13