>6ex3B (B:) observed residues (from ATOM records)
afelpklpyafdalephfdketmeihhdrhhntyvtklnaavegtdlesksieeivanld
svpaniqtavrnnggghlnhslfwellspnseekgtvvekikeqwgsleefkkefadkaa
arfgsgwawlvvnngqleivttpnqdnpltegktpilgldvwehayylkyqnkrpdyiga
fwnvvnwekvdelynat