This family is close to the Hydroxynitrile_lyase of Plants although not fully characterized yet. The first enzyme studied by Reiter et al. was able to hydrolyze a variety of esterase substrates of low to medium carbonic acid chain length, but no triglycerides were hydrolyzed. Despite the high sequence homology, no hydroxynitrile lyase activity could be recognized. Plant Hydroxynitrile_lyase are grouped in another family. Hydroxynitrile_lyase but are very closely related). Proteins in this entry also include pyrethroids pesticides hydrolase PytH from Sphingobium wenxiniae