Chains and heterogens:
PDB Chain Sequences:
>1e54A (A:) essvtlfgivdtnvayvnkdaagdsryglgtsgastsrlglrgtedlggglkagfwlege ifgddgnasgfnfkrrstvslsgnfgevrlgrdlvptsqkltsydlfsatgigpfmgfrn waagqgaddngirannlisyytpnfggfnagfgyafdekqtigtadsvgryiggyvaydn gplsaslglaqqktavgglatdrdeitlgasynfgvaklsgllqqtkfkrdiggdiktns ymlgasapvggvgevklqyalydqkaidskahqitlgyvhnlskrtalygnlaflknkda stlglqakgvyaggvqagesqtgvqvgirhaf