Isoelectric focusing of indoleacetic acid degrading enzymes from pea roots

In homogenates of pea roots only one protein complex is responsible for the degradation of IAA. It consists at least of two enzymes which are probably intimately associated. This protein complex possesses an isoelectric point of 9.5 and has only a small net charge at neutral pH. At least 3 other peroxidases are present with a similar range of molecular weight as commonly displayed by the IAA degrading protein. Probably these enzymes are also bound to membranes.