Chains and heterogens:
PDB Chain Sequences:
>1y4cA (A:) kieegklviwingdkgynglaevgkkfekdtgikvtvehpdkleekfpqvaatgdgpdii fwahdrfggyaqsgllaeitpdkafqdklypftwdavryngkliaypiavealsliynkd llpnppktweeipaldkelkakgksalmfnlqepyftwpliaadggyafkyengkydikd vgvdnagakagltflvdliknkhmnadtdysiaeaafnkgetamtingpwawsnidtskv nygvtvlptfkgqpskpfvgvlsaginaaspnkelakeflenylltdegleavnkdkplg avalksyeeelakdpriaatmenaqkgeimpnipqmsafwyavrtavinaasgrqtvdea lkdaqtnsssnnnnnnnnnnlgiegrsseellkialqeaqktlqqaqelakkgggeeqlk ralkradrnlwaaqelakkggggeellkqalqqaqqllrqaqelakkgggeellkqalqq aqqllqqaqelakk
>1y4cA (A:) egklviwingdkgynglaevgkkfekdtgikvtvehpdkleekfpqvaatgdgpdiifwa hdrfggyaqsgllaeitpdkafqdklypftwdavryngkliaypiavealsliynkdllp nppktweeipaldkelkakgksalmfnlqepyftwpliaadggyafkyengkydikdvgv dnagakagltflvdliknkhmnadtdysiaeaafnkgetamtingpwawsnidtskvnyg vtvlptfkgqpskpfvgvlsaginaaspnkelakeflenylltdegleavnkdkplgava lksyeeelakdpriaatmenaqkgeimpnipqmsafwyavrtavinaasgrqtvdealkd aqtnssslgiegrsseellkialqeaqktlqqaqelakkgggeeqlkralkradrnlwaa qelakkggggeellkqalqqaqqllrqaqelakkgggeellkqalqqaqqllqqaqelak