Chains and heterogens:
PDB Chain Sequences:
>1al21 (1:) aatsrdalpnteasgpthskeipaltavetgatnplvpsdtvqtrhvvqhrsrsessies ffargacvtimtvdnpasttnkdklfavwkitykdtvqlrrklefftysrfdmeltfvvt anftetnnghalnqvyqimyippgapvpekwddytwqtssnpsifytygtaparisvpyv gisnayshfydgfskvplkdqsaalgdslygaaslndfgilavrvvndhnptkvtskirv ylkpkhirvwcprppravayygpgvdykdgtltplstkdltty
>1al22 (2:) eacgysdrvlqltlgnstittqeaansvvaygrwpeylrdseanpvdqptepdvaacrfy tldtvswtkesrgwwwklpdalrdmglfgqnmyyhylgrsgytvhvqcnaskfhqgalgv favpemclagdsntttmhtsyqnanpgekggtftgtftpdnnqtsparrfcpvdyllgng tllgnafvfphqiinlrtnncatlvlpyvnslsidsmvkhnnwgiailplaplnfasess peipitltiapmccefnglrnitlprlq
>1al23 (3:) glpvmntpgsnqyltadnfqspcalpefdvtppidipgevknmmelaeidtmipfdlsat kkntmemyrvrlsdkphtddpilclslspasdprlshtmlgeilnyythwagslkftflf cgsmmatgkllvsyappgadppkkrkeamlgthviwdiglqssctmvvpwisnttyrqti ddsfteggyisvfyqtrivvplstpremdilgfvsacndfsvrllrdtthieqka