Chains and heterogens:
PDB Chain Sequences:
>3est_ (-) vvggteaqrnswpsqislqyrsgsswahtcggtlirqnwvmtaahcvdreltfrvvvgeh nlnqnngteqyvgvqkivvhpywntddvaagydiallrlaqsvtlnsyvqlgvlpragti lannspcyitgwgltrtngqlaqtlqqaylptvdyaicssssywgstvknsmvcaggdgv rsgcqgdsggplhclvngqyavhgvtsfvsrlgcnvtrkptvftrvsayiswinnviasn