obsolete 4alpha-carboxy,4beta,14alpha-dimethyl-9beta,19-cyclo-5alpha-cholest-24-en-3beta-ol dehydrogenase/C4-decarboxylase activity (obsolete GO:0102187)
OBSOLETE. Catalysis of the reaction: 4alpha-carboxy,4beta,14alpha-dimethyl-9beta,19-cyclo-5alpha-cholest-24-en-3beta-ol + NAD(1-) = 4alpha,14alpha-dimethyl-9beta,19-cyclo-5alpha-cholest-24-en-3-one + NADH(2-) + carbon dioxide.