sn-glycerol 3-phosphate + A <=> dihydroxyacetone phosphate + AH2
sn-glycerol 3-phosphate + a <=> dihydroxyacetone phosphate + ah2
sn-glycerol 3-phosphate + A <=> dihydroxyacetone phosphate + AH2
sn-glycerol 3-phosphate + a <=> dihydroxyacetone phosphate + ah2