Chains and heterogens:
PDB Chain Sequences:
>1io2A (A:) mkiagideagrgpvigpmviaavvvdenslpkleelkvrdskkltpkrreklfneilgvl ddyvilelppdvigsregtlnefevenfakalnslkvkpdviyadaadvdeerfarelge rlnfeaevvakhkaddifpvvsaasilakvtrdraveklkeeygeigsgypsdprtrafl enyyrehgefppivrkgwktlkkiaekvesekk