PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 22119138-2 2012 The conversion of XMP to GMP is catalyzed by guaA-encoded GMP synthetase (GMPS), and deletions in the Shiguella flexneri guaBA operon led to an attenuated auxotrophic strain. guanosine 5'-monophosphorothioate 25-28 GMP synthase Mycobacterium tuberculosis H37Rv 45-49