>1br4B (B:) SEQRES residues fseeqtaefkeafqlfdrtgdgkilysqcgdvmralgqnptnaevmkvlgnpksdemnlk tlkfeqflpmmqtiaknkdqgcfedyveglrvfdkegngtvmgaeirhvlvtlgekmtee eveqlvaghedsngcinyeelvrmvlsg