Figure 1.
Steps of transformation of G1P to G6P by α-D-phosphohexomutases. The reversible catalysis proceeds via the G1,6P intermediate that reorients by 180° on enzyme. A red circle marks the phosphoryl group transferred from the 1-position to Ser108 of P. aeruginosa PMM/PGM. Not depicted is the infrequent dissociation of G1,6P.