the conservation of the stable parts of the fold , the absence of the loop structure , the lack of the metal atoms , and the presence of only a small proportion of oxidation-sensitive cysteine residues in crystallin ( 5 versus 15 in the beta 1 dehydrogenase subunit ) suggest an increased stability of the lens protein and a derivation from the alcohol dehydrogenase family .
C0030016
dehydrogenase
C0001942
alcohol dehydrogenase