On of C1 components were purchased from Sigma (St. Louis, MO
Chemexpress On of C1 elements were purchased from Sigma (St. Louis, MO). Lmethionine (methyld3) and D,Lcysteine (three,3d2) were purchased from Cambridge Isotope Laboratories (Andover, MA). SAdenosylLmethionined3 (Smethyld3) tetra (pToluenesulfonate) Salt was…