PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 7770051-3 1995 A computer search of the tobacco plastid genome (ptDNA) identified such a putative gRNA, a 14-nucleotide sequence motif that is complementary to the psbL mRNA, including the A nucleotide required to direct the C-to-U change. 14-nucleotide 91-104 PSII reaction center subunit XII Nicotiana tabacum 149-153