INDIANAPOLIS, IN--(MARKET WIRE)--Jun 4, 2007 -- Protein Discovery, Inc., a provider of products and services for clinical mass spectrometry sample preparation, today announced the company's PPS Silent Surfactant Trial Program at the 55th ASMS Conference on Mass Spectrometry, held June 3 - June 7, in Indianapolis, Indiana. The Trial Program is aimed at introducing mass spectrometry researchers to the benefits of using specialty surfactants to prepare samples for proteolytic digestion and mass spectrometry analysis. The PPS Silent Surfactant Trial program is a "summer special" which will remain active through August 30, 2007, and participants will receive two vials of PPS for the price of one. PPS Silent Surfactant is delivered in 1 mg and 10 mg vials. Program participants may order either vial size.