Chains and heterogens:
PDB Chain Sequences:
>1ig3A (A:) hssglvprgshmehaftplepllptgnlkyclvvlnqpldarfrhlwkkallracadgga nhlydltegeresflpefvsgdfdsirpevkeyytkkgcdlistpdqdhtdftkclqvlq rkieekelqvdvivtlgglggrfdqimasvntlfqathitpvpiiiiqkdsliyllqpgk hrlhvdtgmegswcglipvgqpcnqvtttglkwnltndvlgfgtlvstsntydgsglvtv etdhpllwtmaiks
>1ig3B (B:) mehaftplepllptgnlkyclvvlnqpldarfrhlwkkallracadgganhlydlteger esflpefvsgdfdsirpevkeyytkkgcdlistpdqdhtdftkclqvlqrkieekelqvd vivtlgglggrfdqimasvntlfqathitpvpiiiiqkdsliyllqpgkhrlhvdtgmeg swcglipvgqpcnqvtttglkwnltndvlgfgtlvstsntydgsglvtvetdhpllwtma iks