Chains and heterogens:
PDB Chain Sequences:
>2aaiA (A:) ifpkqypiinfttagatvqsytnfiravrgrlttgadvrheipvlpnrvglpinqrfilv elsnhaelsvtlaldvtnayvvgyragnsayffhpdnqedaeaithlftdvqnrytfafg gnydrleqlagnlrenielgngpleeaisalyyystggtqlptlarsfiiciqmiseaar fqyiegemrtrirynrrsapdpsvitlenswgrlstaiqesnqgafaspiqlqrrngskf svydvsilipiialmvyrcapppssqf
>2aaiB (B:) advcmdpepivrivgrnglcvdvrdgrfhngnaiqlwpcksntdanqlwtlkrdntirsn gkclttygyspgvyvmiydcntaatdatrwqiwdngtiinprsslvlaatsgnsgttltv qtniyavsqgwlptnntqpfvttivglyglclqansgqvwiedcssekaeqqwalyadgs irpqqnrdncltsdsniretvvkilscgpassgqrwmfkndgtilnlysglvldvrasdp slkqiilyplhgdpnqiwlplf