>4y28D (D:) observed residues (from ATOM records)
tppeldpntpspifggstggllrkaqveefyvitwespkeqifemptggaaimregpnll
klarkeqclalgtrlrskykikyqfyrvfpsgevqylhpkdgvypekvnpgrqgvgvnfr
sigknvspievkftgkqpydl