1.1.99.28	D-glucose + D-fructose = D-gluconolactone + D-glucitol	mechanism	10904	
1.1.99.28	D-glucose + D-fructose = D-gluconolactone + D-glucitol	ping-pong mechanism with a single site for all substrates, two half-reactions with alternate reduction of NADP+ and oxidation of NADPH	10902