Protein nitrogen unit

The protein nitrogen unit (PNU) measures the potency of the compounds used in allergy skin tests, and is equivalent to 0.01 microgram (µg) of phosphotungstic acid-precipitable protein nitrogen.^[1] Potency measurements depend on the measurement technique, so that results from different manufacturers cannot be reliably compared: as a result, PNUs are being replaced by (BAU), which are measured by skin testing using reference preparations of standard potency.^[2]

Notes[]

^ May, JC; Sih, JT; Best, J; Douglas, G; Rancour, JM; Renker, HR; Spingola, F; Van Daele, L; Zudeck, S; et al. (November 1981). "Protein nitrogen unit precipitation procedure for allergenic extracts: collaborative study". J Assoc off Anal Chem. 64 (6): 1435–8. PMID 7309663. Site is an abstract provided by PubMed
^ Ross, Rowlett (2002). "P". How Many? A Dictionary of Units of Measurement. University of North Carolina at Chapel Hill. Retrieved 2009-02-05.

This article related to medical equipment is a stub. You can help Wikipedia by .

[1] May, JC; Sih, JT; Best, J; Douglas, G; Rancour, JM; Renker, HR; Spingola, F; Van Daele, L; Zudeck, S; et al. (November 1981). "Protein nitrogen unit precipitation procedure for allergenic extracts: collaborative study". J Assoc off Anal Chem. 64 (6): 1435–8. PMID 7309663. Site is an abstract provided by PubMed

[2] Ross, Rowlett (2002). "P". How Many? A Dictionary of Units of Measurement. University of North Carolina at Chapel Hill. Retrieved 2009-02-05.

[1]

[2]