Four AChE1 mutations were found in resistant strains of T. urticae (F331Y,A280T, G328A, A201S) and three of them, F331W, G328A and A201S, are possibly involved in resistance to OP and CARB insecticides. Published by Khajehali et al. Crystal structure of Pseudomonas sp. MIS38 lipase in an open conformation (2ZVD) is available and soon published by Angkawidjaja et al. Crystal Structure of Acetyl Xylan Esterase 1 from Thermoanaerobacterium sp. JW/SL YS485 (3FCY) is available and soon published by Krastanova et al.