>2btzA (A:) observed residues (from ATOM records)
gsapkyiehfskfspsplsmkqfldfgssnacektsftflrqelpvrlanimkeinllpd
rvlstpsvqlvqswyvqslldimefldkdpedhrtlsqftdalvtirnrhndvvptmaqg
vleykdtygddpvsnqniqyfldrfylsrisirmlinqhtlifdkhigsidpncnvsevv
kdaydmakllcdkyymaspdleiqeinaanskqpihmvyvpshlyhmlfelfknamratv
eshesslilppikvmvalgeedlsikmsdrgggvplrkierlfsymystapgyglpisrl
yakyfqgdlqlfsmegfgtdaviylkalstdsverlpvynksawrhyqtiqeagdwcv