Purity ~83% (SDS-PAGE). Source: Human PRMT9, from SF9 Insect Cells with N-terminal FLAG-Tag, C-terminal Strep-Tag, aa2-845 Assay Description: 10ul reaction mix containing assay buffer with S- adenosylmethionine, specific PRMT9 substrate, and PRMT9 (30-100ng) added to the wells. Add antibody against methylated Arg residue and A-screen Acceptor beads. Incubate for 30 min, then add GSH- conjugated Donor beads followed by Alpha Screening detection. Molecular Weight: ~97kD