Chains and heterogens:
PDB Chain Sequences:
>1px2A (A:) gsnylrrrlsdsnfmanlpngymtdlqrpqppppppsaaspgatpgsaaasaerastaap vaspaapspgssggggffsslsnavkqttaaaaatfseqvgggsggagrggaaarvllvi dephtdwakyfkgkkihgeidikveqaefsdlnlvahanggfsvdmevlrngvkvvrslk pdfvlirqhafsmarngdyrslviglqyagipsvnslhsvynfcdkpwvfaqmvrlhkkl gteefplidqtfypnhkemlssttypvvvkmghahsgmgkvkvdnqhdfqdiasvvaltk tyataepfidakydvrvqkigqnykaymrtsvsgnwktntgsamleqiamsdryklwvdt cseifggldicavealhgkdgrdhiievvgssmpligdhqdedkqlivelvvnkmtqalp rq
>1px2A (A:) aarvllvidephtdwakyfkgkkihgeidikveqaefsdlnlvahanggfsvdmevlrng vkvvrslkpdfvlirqhafsmarngdyrslviglqyagipsvnslhsvynfcdkpwvfaq mvrlhkklgteefplidqtfypnhkemlssttypvvvkmghahsgmgkvkvdnqhdfqdi asvvaltktyataepfidakydvrvqkigqnykaymrtwkleqiamsdryklwvdtcsei fggldicavealhgkdgrdhiievvgssmpligdhqdedkqlivelvvnkmtqa
>1px2B (B:) gsnylrrrlsdsnfmanlpngymtdlqrpqppppppsaaspgatpgsaaasaerastaap vaspaapspgssggggffsslsnavkqttaaaaatfseqvgggsggagrggaaarvllvi dephtdwakyfkgkkihgeidikveqaefsdlnlvahanggfsvdmevlrngvkvvrslk pdfvlirqhafsmarngdyrslviglqyagipsvnslhsvynfcdkpwvfaqmvrlhkkl gteefplidqtfypnhkemlssttypvvvkmghahsgmgkvkvdnqhdfqdiasvvaltk tyataepfidakydvrvqkigqnykaymrtsvsgnwktntgsamleqiamsdryklwvdt cseifggldicavealhgkdgrdhiievvgssmpligdhqdedkqlivelvvnkmtqalp rq
>1px2B (B:) arvllvidephtdwakyfkgkkihgeidikveqaefsdlnlvahanggfsvdmevlrngv kvvrslkpdfvlirqhafsmarngdyrslviglqyagipsvnslhsvynfcdkpwvfaqm vrlhkklgteefplidqtfypnhkemlssttypvvvkmghahsgmgkvkvdnqhdfqdia svvaltktyataepfidakydvrvqkigqnykaymrtwktleqiamsdryklwvdtcsei fggldicavealhgkdgrdhiievvgssmpligdhqdedkqlivelvvnkmtqa