We are sorry to bring bad news that Dr. Elsa Reiner , outstanding scientist with a high contribution to the enzymology of cholinesterases, passed away peacefully in sleep yesterday. A paper by Drs Peter Eyer and Ladislaus Szinicz dedicated to Elsa Reiner in honor of her important contributions is published in Toxicology Letters Crystal Structure of a Novel Esterase Rv0045c from Mycobacterium tuberculosis (3P2M) is available and published by Zheng et al.