Figure 8.
Bioorthogonal profiling approach to label PMT substrates. Native PMTs use SAM as the cofactor to methylate their targets. In contrast, PMTs can be engineered to accommodate SAM derivatives as cofactors and label their substrates with distinct chemical groups. Since bulky SAM analogues are inert to native PMTs, the resultant distinctly-modified substrates can be assigned to a single, designated PMT.
