Chains and heterogens:
PDB Chain Sequences:
>1nn2_ (-) veyrnwskpqcqitgfapfskdnsirlsaggdiwvtrepyvscdpvkcyqfalgqgttld nkhsndtvhdriphrtllmnelgvpfhlgtrqvciawsssschdgkawlhvcitgddkna tasfiydgrlvdsigswsqnilrtqesecvcingtctvvmtdgsasgradtrilfieegk ivhisplagsaqhveecscyprypgvrcicrdnwkgsnrpvvdinmedysidssyvcsgl vgdtprnddrssnsncrdpnnergtqgvkgwafdngndlwmgrtiskdlrsgyetfkvig gwstpnsksqinrqvivdsdnrsgysgifsvegkscinrcfyvelirgrkqetrvwwtsn sivvfcgtsgtygtgswpdganinfmpi