>4FN4_1|Chains A, B, C, D|Short chain dehydrogenase|Sulfolobus acidocaldarius (330779) SYQSLKNKVVIVTGAGSGIGRAIAKKFALNDSIVVAVELLEDRLNQIVQELRGMGKEVLGVKADVSKKKDVEEFVRRTFETYSRIDVLCNNAGIMDGVTPVAEVSDELWERVLAVNLYSAFYSSRAVIPIMLKQGKGVIVNTASIAGIRGGFAGAPYTVAKHGLIGLTRSIAAHYGDQGIRAVAVLPGTVKTNIGLGSSKPSELGMRTLTKLMSLSSRLAEPEDIANVIVFLASDEASFVNGDAVVVDGGLTVL