2.2 SQUARE inside PROTEIN p0 inside PROTEIN p1 inside SIMPLE_MOLECULE _space_10_minus_Formyltetrahydrofolate inside SIMPLE_MOLECULE Formate inside SIMPLE_MOLECULE _space_5_space_10_minus_Methenyltetrahydrofolate inside SIMPLE_MOLECULE _space_5_space_10_minus_Methylenetetrahydrofolate STATE_TRANSITION Formate _space_10_minus_Formyltetrahydrofolate c1 c0 STATE_TRANSITION _space_5_space_10_minus_Methenyltetrahydrofolate _space_5_space_10_minus_Methylenetetrahydrofolate c2 c3