4efg A 1.58 BS01 RET A 1 W19 A33 Q38 C53 W58 N59 W106 K108 L117 W19 A33 Q38 C53 W58 N59 W106 K108 L117 ? 0005501,0005504,0005634,0005737,0005829,0006776,0008289,0008544,0015908,0016918,0019841 -logKd/Ki=7.26, Kd=55nM P50120 23224553 201 TRDQNGTWEMESNENFEGWMKALDIDFALRKIAVRLTQTLVIDQDGDNFKVKCTSTFWNYDVDFTVGVEFDEYTKSLDNRHVKALVTWEGDVLVCVQKGEKENRGWKKWIEGDKLYLELTCGDQVCRQVFKKK 4efg B 1.58 BS01 RET B 1 W106 K108 W106 K108 ? 0005501,0005504,0005634,0005737,0005829,0006776,0008289,0008544,0015908,0016918,0019841 P50120 23224553 201 TRDQNGTWEMESNENFEGWMKALDIDFALRKIAVRLTQTLVIDQDGDNFKVKCTSTFWNYDVDFTVGVEFDEYTKSLDNRHVKALVTWEGDVLVCVQKGEKENRGWKKWIEGDKLYLELTCGDQVCRQVFKKK