John McEntire

by John C. Anders, aaiPharma, Inc., Benne F. Parten, Glenn E. Petrie , Robert L. Marlowe , and John E. McEntire Amino acid analysis (AAA) of well-recovered residues offers an easy way to calculate the absorptivity constant for a known protein. The method provides an absolute measure of protein concentration, free from interference from water, excipients, and bound salts. This article demonstrates a qualified method for determining protein content by AAA.

by John E. McEntire Is your company gambling with analytical mehods and with your product's future? Play validation bingo and find out.

by Nadine Ritter, and John McEntire. Determining protein concentration is one of the most important analytical methods used in the discovery, development, and manufacturing of protein products. Part 1 discusses a number of methods for analyzing samples ranging from complex mixtures to highly purified proteins.