2.2 SQUARE inside PROTEIN p0 inside PROTEIN p1 inside PROTEIN p2 inside SIMPLE_MOLECULE H_plus_ inside SIMPLE_MOLECULE L_minus_Serine inside SIMPLE_MOLECULE _space_5_space_10_minus_Methylenetetrahydrofolate inside SIMPLE_MOLECULE CO2 inside SIMPLE_MOLECULE Corrinoid inside SIMPLE_MOLECULE Acetyl_minus_CoA inside SIMPLE_MOLECULE Methylcorrinoid inside SIMPLE_MOLECULE Glycine inside SIMPLE_MOLECULE Formate STATE_TRANSITION Formate CO2 c8 c3 c0 STATE_TRANSITION Methylcorrinoid Acetyl_minus_CoA c6 c3 c5 c4 STATE_TRANSITION _space_5_space_10_minus_Methylenetetrahydrofolate L_minus_Serine c2 c7 c1