>3b2uN (N:) observed residues (from ATOM records)
qvqlqesgpglvkpsqtlsltctvsggsissgdyywswirqppgkglewigyiyysgstd
ynpslksrvtmsvdtsknqfslkvnsvtaadtavyycarvsifgvgtfdywgqgtlvtvs
sastkgpsvfplapsggtaalgclvkdyfpepvtvswnsgaltsgvhtfpavlqssglys
lssvvtvpssslgtqtyicnvnhkpsntkvdkkvepks