PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 23247392-2 2013 Evidence indicates that cardiac relaxation may depend on nitric oxide (NO), generated by NO synthase (NOS) requiring the co-factor tetrahydrobiopterin (BH(4)). sapropterin 131-150 nitric oxide synthase 1, neuronal Mus musculus 89-100