Chains and heterogens:
PDB Chain Sequences:
>1k3cA (A:) mrvnngltpqeleaygisdvhdivynpsydllyqeeldpsltgyergvltnlgavavdtg iftgrspkdkyivrddttrdtfwwadkgkgkndnkplspetwqhlkglvtrqlsgkrlfv vdafcganpdtrlsvrfitevawqahfvknmfirpsdeelagfkpdfivmngakctnpqw keqglnsenfvafnltermqliggtwyggemkkgmfsmmnyllplkgiasmhcsanvgek gdvavffglsgtgkttlstdpkrrligddehgwdddgvfnfeggcyaktiklskeaepei ynairrdallenvtvredgtidfddgsktentrvsypiyhidnivkpvskaghatkvifl tadafgvlppvsrltadqtqyhflsgftaklagtergiteptptfsacfgaaflslhptq yaevlvkrmqaagaqaylvntgwngtgkrisikdtraiidailngsldnaetftlpmfnl aiptelpgvdtkildprntyaspeqwqekaetlaklfidnfdkytdtpagaalvaagpkl
>1k3cA (A:) gltpqeleaygisdvhdivynpsydllyqeeldpsltgyergvltnlgavavdtgiftgr spkdkyivrddttrdtfwwadkgkgkndnkplspetwqhlkglvtrqlsgkrlfvvdafc ganpdtrlsvrfitevawqahfvknmfirpsdeelagfkpdfivmngakctnpqwkeqgl nsenfvafnltermqliggtwyggemkkgmfsmmnyllplkgiasmhcsanvgekgdvav ffglsgtgkttlstdpkrrligddehgwdddgvfnfeggcyaktiklskeaepeiynair rdallenvtvredgtidfddgsktentrvsypiyhidnivkpvskaghatkvifltadaf gvlppvsrltadqtqyhflsgftaklagtergiteptptfsacfgaaflslhptqyaevl vkrmqaagaqaylvntgwngtgkrisikdtraiidailngsldnaetftlpmfnlaipte lpgvdtkildprntyaspeqwqekaetlaklfidnfdkytdtpagaalvaagpkl