Chains and heterogens:
PDB Chain Sequences:
>1qixB (B:) vvggteaqrnswpsqislqyrsgsswahtcggtlirqnwvmtaahcvdreltfrvvvgeh nlnqnngteqyvgvqkivvhpywntddvaagydiallrlaqsvtlnsyvqlgvlpragti lannspcyitgwgltrtngqlaqtlqqaylptvdyaicssssywgstvknsmvcaggdgv rsgcqgdsggplhclvngqyavhgvtsfvsrlgcnvtrkptvftrvsayiswinnviasn