Chains and heterogens:
PDB Chain Sequences:
>1nk1A (A:) yvegqrkrrntihefkksakttlikidpalkiktkkvntadqcanrctrnkglpftckaf vfdkarkqclwfpfnsmssgvkkefghefdlyenkdyirnciigkgrsykgtvsitksgi kcqpwssmiphehsflpssyrgkdlqenycrnprgeeggpwcftsnpevryevcdipqcs eve
>1nk1A (A:) tihefkksakttlikidpalkiktkkvntadqcanrctrnkglpftckafvfdkarkqcl wfpfnsmssgvkkefghefdlyenkdyirnciigkgrsykgtvsitksgikcqpwssmip hehsflpssyrgkdlqenycrnprgeeggpwcftsnpevryevcdipqcsev
>1nk1B (B:) yvegqrkrrntihefkksakttlikidpalkiktkkvntadqcanrctrnkglpftckaf vfdkarkqclwfpfnsmssgvkkefghefdlyenkdyirnciigkgrsykgtvsitksgi kcqpwssmiphehsflpssyrgkdlqenycrnprgeeggpwcftsnpevryevcdipqcs eve
>1nk1B (B:) tihefkksakttlikidpalkiktkkvntadqcanrctrnkglpftckafvfdkarkqcl wfpfnsmssgvkkefghefdlyenkdyirnciigkgrsykgtvsitksgikcqpwssmip hehsflpssyrgkdlqenycrnprgeeggpwcftsnpevryevcdipqcsev