PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 143819-5 1977 The conformations of formycin and formycin B have strong analogies with those of the 8-bromopurineribosides and differ significantly from those of the 8-azapurineribosides since they adopt preferentially the syn-S-g+ conformation. formycin B 34-44 synemin Homo sapiens 208-211