>4ttvB (B:) observed residues (from ATOM records)
sdhrkigrdqelyffhelspgscfflpkgayiynaliefirseyrkrgfqevvtpnifns
rlwmtsghwqhysenmfsfevekelfalkpmncpghclmfdhrprswrelplrladfgvl
hrnelsgaltgltrvrrfqqddahifcameqiedeikgcldflrtvysvfgfsfklnlst
rpekflgdievwdqaekqlenslnefgekwelnsgdgafygpkidiqikdaigryhqcat
iqldfqlpirfnltyvshdgddkkrpvivhrailgsvermiailtenyggkwpfwlsprq
vmvvpvgptcdeyaqkvrqqfhdakfmadidldpgctlnkkirnaqlaqynfilvvgeke
kisgtvnirtrdnkvhgertisetierlqqlkefrskqaeeef