>4tswB (B:) observed residues (from ATOM records)
sdkpvahvvanpqaegqlqwsnrranallangvelrdnqlvvpieglfliysqvlfkgqg
cpsthvllthtisriavsyqtkvnllsaikspcqretpegaeakpwyepiylggvfqlek
gdrlsaeinrpdyldfaesgqvyfgiial