PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 21776414-4 2011 The gunmetal (gm/gm) mouse bears a mutation in the catalytic subunit of RGGT, causing a loss of 75% of the activity of this enzyme and hence hypoprenylation of several Rabs in melanocytes, platelets and cytotoxic T cells. rabs 168-172 Rab geranylgeranyl transferase, a subunit Mus musculus 4-12