But things get much murkier when it is a task order for a defense customer issued against a civilian IDIQ. There are about a dozen protests pending at GAO right now that fall into that crossover category, where a defense agency used a GSA contract such as Alliant or OASIS to hire a contractor.
purified protein derivative (PPD). [pyoÌoÌâ²rifÄ«d]. a dried form of tuberculin used in testing for past or present infection with tubercle bacilli. This product is usually introduced into the skin during such tests and may produce a tuberculin reaction (wheal) within 48 to 72 hours.
PRPP synÂ·theÂ·tase. An enzyme that catalyzes the reaction of Î±- d-ribose 5-phosphate and ATP to produce PRPP and AMP; a regulatory enzyme in purine and pyrimidine biosynthesis; enhanced activity of this enzyme results in an increase in purine biosynthesis leading to gout.1  Facebook.RPP synÂ·theÂ·tase. An enzyme that catalyzes the reaction of Î±- d-ribose 5-phosphate and ATP to produce PRPP and AMP; a regulatory enzyme in purine and pyrimidine biosynthesis; enhanced activity of this enzyme results in an increase in purine biosynthesis leading to gout. 1  Facebook.