>4xv7A (A:) observed residues (from ATOM records)
lvhvasvekgrsyedfqkvynaialklreddeydnyigygpvlvrlawhisgtwdkhdnt
ggsyggtyrfkkefndpsnaglqngfkflepihkefpwissgdlfslggvtavqemqgpk
ipwrcgrvdtpedttpdngrlpdadkdagyvrtffqrlnmndrevvalmgahalgkthlk
nsgyegggannvftnefylnllnedwklekndanneqwdsksgymmlptdysliqdpkyl
sivkeyandqdkffkdfskafekllengitfpkdapspfifktleeqgl