1.1.1.116	D-arabinose 1-dehydrogenase (NAD+)	dehydro-D-arabinono-1,4-lactone biosynthesis	
1.1.1.427	D-arabinose 1-dehydrogenase (NADP+)	dehydro-D-arabinono-1,4-lactone biosynthesis	
1.1.3.37	D-arabinono-1,4-lactone oxidase	dehydro-D-arabinono-1,4-lactone biosynthesis