2.2 SQUARE inside PROTEIN p0 inside PROTEIN p1 inside PROTEIN p2 inside SIMPLE_MOLECULE Folic_space_acid inside SIMPLE_MOLECULE Tetrahydrofolyl_minus__space_Glu_space__space_n_space_ inside SIMPLE_MOLECULE Dihydrofolate inside SIMPLE_MOLECULE Tetrahydrofolyl_minus__space_Glu_space__space_2_space_ inside SIMPLE_MOLECULE Tetrahydrofolate inside SIMPLE_MOLECULE Dihydropteroate STATE_TRANSITION Tetrahydrofolate Dihydrofolate c4 c2 STATE_TRANSITION Dihydropteroate Dihydrofolate c5 c2 STATE_TRANSITION Tetrahydrofolate Tetrahydrofolyl_minus__space_Glu_space__space_2_space_ c4 c3 STATE_TRANSITION Tetrahydrofolyl_minus__space_Glu_space__space_n_space_ Tetrahydrofolyl_minus__space_Glu_space__space_n_space_ c1 c1 STATE_TRANSITION Tetrahydrofolate Folic_space_acid c4 c0 STATE_TRANSITION Folic_space_acid Dihydrofolate c0 c2