2.2 SQUARE inside PROTEIN p0 inside PROTEIN p1 inside PROTEIN p2 inside PROTEIN p3 inside SIMPLE_MOLECULE _space_4_minus_Aminobutanoate inside SIMPLE_MOLECULE _space_4_minus_Acetamidobutanoate inside SIMPLE_MOLECULE N4_minus_Acetylaminobutanal inside SIMPLE_MOLECULE _space_4_minus_Aminobutanal inside SIMPLE_MOLECULE L_minus_Arginine inside SIMPLE_MOLECULE L_minus_Citrulline inside SIMPLE_MOLECULE L_minus_Proline inside RNA L_minus_Arginyl_minus_tRNA_space_Arg_space_ inside RNA L_minus_Prolyl_minus_tRNA_space_Pro_space_ STATE_TRANSITION L_minus_Proline L_minus_Prolyl_minus_tRNA_space_Pro_space_ c6 c8 STATE_TRANSITION L_minus_Arginine L_minus_Citrulline c4 c5 STATE_TRANSITION L_minus_Arginine L_minus_Arginyl_minus_tRNA_space_Arg_space_ c4 c7 STATE_TRANSITION _space_4_minus_Aminobutanal _space_4_minus_Aminobutanoate c3 c0 STATE_TRANSITION N4_minus_Acetylaminobutanal _space_4_minus_Acetamidobutanoate c2 c1