Chains and heterogens:
PDB Chain Sequences:
>1h4uA (A:) csvhaecrdyatgfccrcvanytgngrqcvaegspqrvngkvkgrifvgssqvpvvfent dlhsyvvmnhgrsytaistipetvgysllplapiggiigwmfaveqdgfkngfsitggef trqaevtflghpgklvlkqqfsgidehghltistelegrvpqipygasvhiepytelyhy sssvitssstreytvmepdqdgaapshthiyqwrqtitfqecahddarpalpstqqlsvd svfvlynkeerilryalsnsigpvr
>1h4uA (A:) csvhaeccrcvanytgngrqcvaegspqrvngkvkgrifvgssqvpvvfentdlhsyvvm nhgrsytaistipetvgysllplapiggiigwmfaveqdgfkngfsitggeftrqaevtf lghpgklvlkqqfsgidehghltistelegrvpqipygasvhiepytelyhysssvitss streytvmeppshthiyqwrqtitfqecpalpstqqlsvdsvfvlynkeerilryalsns igpvr