Chains and heterogens:
PDB Chain Sequences:
>2fgrA (A:) essvtlfgivdtnvayvnkdaagdsryglgtsgastsrlglrgtedlggglkagfwlege ifgddgnasgfnfkrrstvslsgnfgevrlgrdlvptsqkltsydlfsatgigpfmgfrn waagqgaddngirannlisyytpnfggfnagfgyafdekqtigtadsvgryiggyvaydn gplsaslglaqqktavgglatdrdeitlgasynfgvaklsgllqqtkfkrdiggdiktns ymlgasapvggvgevklqyalydqkaidskahqitlgyvhnlskrtalygnlaflknkda stlglqakgvyaggvqagesqtgvqvgirhaf