Chains and heterogens:
PDB Chain Sequences:
>1qquA (A:) ivggytcaansipyqvslnsgshfcggslinsqwvvsaahcyksriqvrlgehnidvleg neqfinaakiithpnfngntldndimliklsspatlnsrvatvslprscaaagteclisg wgntkssgssypsllqclkapvlsnssckssypgqitgnmicvgflqggkdscqgdsggp vvcngqlqgivswgygcaqknkpgvytkvcnyvnwiqqtiaan