Chains and heterogens:
PDB Chain Sequences:
>3j9sA (A:) mdvlyslsktlkdardkivegtlysnvsdliqqfnqmiitmngnefqtggignlpirnwn fdfgllgttllnldanyvetarntidyfvdfvdnvcmdemvresqrngiapqsdslikls gikfkrinfdnsseyienwnlqnrrqrtgftfhkpnifpysasftlnrsqpahdnlmgtm wlnagseiqvagfdyscainapantqqfehivqlrrvlttatitllpdaerfsfprvits adgattwyfnpvilrpnnveiefllngqiintyqarfgtiiarnfdtirlsfqlmrppnm tpavaalfpnaqpfehhatvgltlriesavcesvladasetmlanvtsvrqeyaipvgpv fppgmnwtdlitnyspsrednlqrvftvasirsmlvk