Chains and heterogens:
PDB Chain Sequences:
>4k3lA (A:) mkftverehllkplqqvsgplggrptlpilgnlllqvadgtlsltgtdlememvarvalv qphepgattvparkffdicrglpegaeiavqlegermlvrsgrsrfslstlpaadfpnld dwqseveftlpqatmkrlieatqfsmahqdvryylngmlfetegeelrtvatdghrlavc smpigqslpshsvivprkgvielmrmldggdnplrvqigsnnirahvgdfiftsklvdgr fpdyrrvlpknpdkhleagcdllkqafaraailsnekfrgvrlyvsenqlkitannpeqe eaeeildvtysgaemeigfnvsyvldvlnalkcenvrmmltdsvssvqiedaasqsaayv vmpmrl
>4k3lA (A:) mkftverehllkplqqvspilgnlllqvadgtlsltgtdlememvarvalvqphepgatt vparkffdicrglpegaeiavqlegermlvrsgrsrfslstlpaadfpnlddwqseveft lpqatmkrlieatqfsmahqdvryylngmlfetegeelrtvatdghrlavcsmpigqslp shsvivprkgvielmrmldnplrvqigsnnirahvgdfiftsklvdgrfpdyrrvlpknp dkhleagcdllkqafaraailsnekfrgvrlyvsenqlkitannpeqeeaeeildvtysg aemeigfnvsyvldvlnalkcenvrmmltdsvssvqiedaasqsaayvvmpmr
>4k3lB (B:) mkftverehllkplqqvsgplggrptlpilgnlllqvadgtlsltgtdlememvarvalv qphepgattvparkffdicrglpegaeiavqlegermlvrsgrsrfslstlpaadfpnld dwqseveftlpqatmkrlieatqfsmahqdvryylngmlfetegeelrtvatdghrlavc smpigqslpshsvivprkgvielmrmldggdnplrvqigsnnirahvgdfiftsklvdgr fpdyrrvlpknpdkhleagcdllkqafaraailsnekfrgvrlyvsenqlkitannpeqe eaeeildvtysgaemeigfnvsyvldvlnalkcenvrmmltdsvssvqiedaasqsaayv vmpmrl
>4k3lB (B:) mkftverehllkplqqvsglpilgnlllqvadgtlsltgtdlememvarvalvqphepga ttvparkffdicrglpegaeiavqlegermlvrsgrsrfslstlpaadfpnlddwqseve ftlpqatmkrlieatqfsmahqdvryylngmlfetegeelrtvatdghrlavcsmpigqs lpshsvivprkgvielmrmldggdnplrvqigsnnirahvgdfiftsklvdgrfpdyrrv lpknpdkhleagcdllkqafaraailsnekfrgvrlyvsenqlkitannpeqeeaeeild vtysgaemeigfnvsyvldvlnalkcenvrmmltdsvssvqiedaasqsaayvvmpmrl