Chains and heterogens:
PDB Chain Sequences:
>4tw9A (A:) melrvgnryrlgnkigsgsfgdiylgtdiaageevaiklecvktkhpqlhieskiykmmq ggvgiptirwcgaegdynvmvmellgpsledlfnfcsrkfslktvllladqmisrieyih sknfihrdvkpdnflmglgkkgnlvyiidfglakkyrdarthqhipyrenknltgtarya sinthlgieqsrrddleslgyvlmyfnlgslpwqglkaatkrqkyerisekkmstpievl ckgypsefatylnfcrslrfddkpdysylrqlfrnlfhrqgfsydyvfdwnmlkf
>4tw9A (A:) elrvgnryrlgnkigsgsfgdiylgtdiaageevaiklecvktkhpqlhieskiykmmqg gvgiptirwcgaegdynvmvmellgpsledlfnfcsrkfslktvllladqmisrieyihs knfihrdvkpdnflmglgkkgnlvyiidfglakkyrdarthqhipyrenknltgtaryas inthlgieqsrrddleslgyvlmyfnlgslpwqglkaakyerisekkmstpievlckgyp sefatylnfcrslrfddkpdysylrqlfrnlfhrqgfsydyvfdwnmlkf
>4tw9B (B:) melrvgnryrlgnkigsgsfgdiylgtdiaageevaiklecvktkhpqlhieskiykmmq ggvgiptirwcgaegdynvmvmellgpsledlfnfcsrkfslktvllladqmisrieyih sknfihrdvkpdnflmglgkkgnlvyiidfglakkyrdarthqhipyrenknltgtarya sinthlgieqsrrddleslgyvlmyfnlgslpwqglkaatkrqkyerisekkmstpievl ckgypsefatylnfcrslrfddkpdysylrqlfrnlfhrqgfsydyvfdwnmlkf
>4tw9B (B:) melrvgnryrlgnkigsgsfgdiylgtdiaageevaiklecvktkhpqlhieskiykmmq ggvgiptirwcgaegdynvmvmellgpsledlfnfcsrkfslktvllladqmisrieyih sknfihrdvkpdnflmglgkkgnlvyiidfglakkyrdarthqhipyrenknltgtarya sinthlgieqsrrddleslgyvlmyfnlgslpwqglkkyerisekkmstpievlckgyps efatylnfcrslrfddkpdysylrqlfrnlfhrqgfsydyvfdwnmlkf