Chains and heterogens:
PDB Chain Sequences:
>3fpxA (A:) avgpvadltitdaavspdgfsrqavvvngvtpgplvagnigdrfqlnvidnltnhtmlks tsihwhgffqhgtnwadgpafinqcpispghsflydfqvpdqagtfwyhshlstqycdgl rgpfvvydpndphasrydvdnddtvitladwyhtaaklgprfpggadatlingkgrapsd svaelsvikvtkgkryrfrlvslscnpnhtfsidghnltiievdsvnsqplevdsiqifa aqrysfvldanqavdnywiranpnfgnvgfdgginsailrydgapavepttnqttsvkpl nevdlhplvstpvpgspssggvdkainmafnfngsnffingasfvpptvpvllqilsgaq taqdllpsgsvyvlpsnasieisfpataaapgaphpfhlhghtfavvrsagstvynydnp ifrdvvstgtpaagdnvtirfdtnnpgpwflhchidfhleggfavvmaedtpdvkavnpv pqawsdlcptydaldpndq