>2b3tB (B:) observed residues (from ATOM records)
aklealherheevqallgdaqtiadqerfralsreyaqlsdvsrcftdwqqvqqlqvlll
pkdpddernaflevragtggdeaalfagdlfrmysryaearrwrveimsasegehggyke
iiakisgdgvygrlkfesgghrvqrvpatesqgrihtsactvavmpelpdaelpdvnpad
lridtfrssgaggqhvnttdsairithlptgivvecqdersqhknkakalsvlgarihaa
emakrqrrnsdrnrtynfpqgrvtdhrinltlyrldevmegkldmliepiiqehqadqla