Chains and heterogens:
PDB Chain Sequences:
>1ab4_ (-) vgralpdvrdglkpvhrrvlyamnvlgndwnkaykksarvvgdvigkyhphgdsavydti vrmaqpfslrymlvdgqgnfgsidgdsaaamryteirlakiahelmadleketvdfvdny dgtekipdvmptkipnllvngssgiavgmatnipphnltevingclayiddedisieglm ehipgpdfptaaiingrrgieeayrtgrgkvyiraraevevetiivheipyqvnkarlie kiaelvkekrvegisalrdesdkdgmriviegevvlnnlysqtqlqvsfginmvalhhgq pkimnlkdiiaafvrhrrevvtrrtifelrkardrahilealavalanidpiielirhap tpaeaktalvanpwqlgnvaamledaarpewlepefgvrdglyylteqqaqaildlrlqk ltgleheklldeykelldqiaellrilgsadrlmevireelelvreqfgdkrrteit