Populus sp. - 713037 Streptomyces avermitilis - 674128, 757603 Streptomyces avermitilis 7-O-methyltransferase; gene SaOMT or SAV_2382 718652 Streptomyces avermitilis DSM 46492 - 757603 Streptomyces avermitilis MA-4680 - 674128 Streptomyces peucetius subsp. caesius - 755826 Streptomyces peucetius subsp. caesius ATCC 27952 - 755826