Chains and heterogens:
PDB Chain Sequences:
>1jsa_ (-) gnsksgalskeileelqlntkfteeelsswyqsflkecpsgritrqefqtiyskffpead pkayaqhvfrsfdansdgtldfkeyvialhmtsagktnqklewafslydvdgngtiskne vleivtaifkmispedtkhlpedentpekraekiwgffgkkdddkltekefiegtlanke ilrliqfe