Chains and heterogens:
PDB Chain Sequences:
>2tddA (A:) mleqpyldlakkvldeghfkpdrthtgtysifghqmrfdlskgfpllttkkvpfglikse llwflhgdtnirfllqhrnhiwdewafekwvksdeyhgpdmtdfghrsqkdpefaavyhe emakfddrvlhddafaakygdlglvygsqwrawhtskgdtidqlgdvieqikthpysrrl ivsawnpedvptmalppchtlyqfyvndgklslqlyqrsadiflgvpfniasyallthlv ahecglevgefihtfgdahlyvnhldqikeqlsrtprpaptlqlnpdkhdifdfdmkdik llnydpypaikapva