p.D70G/E441G/E443Q Asp70Gly/Glu441Gly/Glu443Gln (p.D98G/E469G/E471Q Asp98Gly/Glu469Gly/Glu4471Gln in primary sequence with 28 amino-acids signal peptide) Succinylcholine hydrolysis/Dibucaine inhibition 441 and 443 bind succinylcholine but mutant do not bind dibucaine