2.2 SQUARE inside PROTEIN p0 inside PROTEIN p1 inside PROTEIN p2 inside SIMPLE_MOLECULE Tetrahydrofolate inside SIMPLE_MOLECULE Dihydrofolate inside SIMPLE_MOLECULE _space_5_space_10_minus_Methylenetetrahydrofolate inside SIMPLE_MOLECULE Folic_space_acid STATE_TRANSITION Folic_space_acid Dihydrofolate c3 c1 STATE_TRANSITION _space_5_space_10_minus_Methylenetetrahydrofolate Dihydrofolate c2 c1 STATE_TRANSITION Dihydrofolate Tetrahydrofolate c1 c0 STATE_TRANSITION _space_5_space_10_minus_Methylenetetrahydrofolate Tetrahydrofolate c2 c0