>1b4aD (D:) observed residues (from ATOM records)
gqrhikireiimsndietqdelvdrlreagfnvtqatvsrdikemqlvkvpmangrykys
lpsdqrfnplqklkralvdvfikldgtgnllvlrtlpgnahaigvlldnldwdeivgtic
gddtcliicrtpkdakkvsnqllsml