Chains and heterogens:
PDB Chain Sequences:
>3ckzA (A:) vklagnsslcpingwavyskdnsirigskgdvfvirepfiscshlecrtffltqgallnd khsngtvkdrsphrtlmscpvgeapspynsrfesvawsasachdgtswltigisgpdnga vavlkyngiitdtikswrnnilrtqesecacvngscftvmtdgpsngqasykifkmekgk vvksveldapnyyyeecscypnageitcvcrdnwhgsnrpwvsfnqnleyqigyicsgvf gdnprpndgtgscgpvssngaygvkgfsfkygngvwigrtkstnsrsgfemiwdpngwte tdssfsvkqdivaitdwsgysgsfvqhpeltgldcirpcfwvelirgrpkestiwtsgss isfcgvnsdtvgwswpdgaelpfti