Chains and heterogens:
PDB Chain Sequences:
>1nsa_ (-) fegekvfrvnvedendiselhelastrqidfwkpdsvtqikphstvdfrvkaedilaved fleqnelqyevlinnlrsvleaqfdsvsrttghsyekynnwetieawteqvtsknpdlis rsaigttfdgdniyllkvgkpgsnkpaifmdcgfharewisqafcqwfvrdavrtygyea hmtefldnldfyvlpvlnidgyiytwtknrmwrktrstnagssctgtdpnrnfnagwctv gasvnpcnetycgsaaeseketkaladfirnnlssikayltihsysqmilypysydyklp endaelnslakgavkelaslygtsysygpgsttiypaaggsddwaynqgikysftfelrd kgrfgfvlpesqiqatcqetmlavkyvtnytlehl