Chains and heterogens:
PDB Chain Sequences:
>4u54A (A:) vnwsvedivkginsnnlesqlqatqaarkllsrekqppidniiraglipkfvsflgktdc spiqfesawaltniasgtseqtkavvdggaipafisllasphahiseqavwalgniagdg safrdlvikhgaidpllallavpdlstlacgylrnltwtlsnlcrnknpappldaveqil ptlvrllhhndpevladscwaisyltdgpneriemvvkkgvvpqlvkllgatelpivtpa lraignivtgtdeqtqkvidagalavfpslltnpktniqkeatwtmsnitagrqdqiqqv vnhglvpflvgvlskadfktqkeaawaitnytsggtveqivylvhcgiieplmnllsakd tkiiqvildaisnifqaaeklgeteklsimieecggldkiealqrhenesvykaslnlie kyfsv