Sophorose as an inducer of cellulase in Trichoderma viride

Mandels, Mary (Quartermaster Research and Engineering Center, Natick, Mass.), Fredrick W. Parrish, and Elwyn T. Reese. Sophorose as an inducer of cellulase in Trichoderma viride. J. Bacteriol. 83:400-408. 1962.-The impurity in glucose responsible for cellulase induction in Trichoderma viride QM 6a has been isolated and characterized as sophorose (2-O-beta-d-glucopyranosyl-d-glucose). It is present at 0.0058% in reagent grade glucose. Sophorose is a very powerful inducer of cellulase for Trichoderma viride, being 2500 times as active as cellobiose. Modifications of sophorose, such as reduction or glycoside formation, destroy its inducing ability. The high activity of sophorose as an inducer is specific for T. viride.

The in vitro effect of prolactin on beta-glucuronidase in the testis of the rat

The effect of prolactin on the activity of β-glucuronidase in the testis of the rat and mouse has been studied in vitro.

Prolactin increased this activity, and a linear log dose-response relationship was found to exist with doses of between 0·3 and 1·2 mg. of a preparation of prolactin containing between 20 and 25 i.u./mg.

The optimal conditions for this effect have been investigated.

Twenty other substances have been tested; none increased the enzymic activity, but six decreased it.

Possible mechanisms for this effect are discussed.