1-deoxy-D-xylulose 5-phosphate + methanethiol + A => S-methyl-1-thio-D-xylulose 5-phosphate + AH2
1-deoxy-d-xylulose 5-phosphate + methanethiol + a => s-methyl-1-thio-d-xylulose 5-phosphate + ah2
1-deoxy-D-xylulose 5-phosphate + methanethiol + A => S-methyl-1-thio-D-xylulose 5-phosphate + AH2
1-deoxy-d-xylulose 5-phosphate + methanethiol + a => s-methyl-1-thio-d-xylulose 5-phosphate + ah2