PR:P79621-1 mCIITA/iso:m1 MHC class II transactivator isoform m1 (mouse) mCIITA/iso:m1|MHC class II transactivator isoform I (mouse) PR:000000001 NCBITaxon:10090 MGI:MGI:108445 PR:P79621 UniProtKB:P79621-1