BioPharm International-02-01-2003

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 Gail Sofer, BioReliance Both the process and the product strongly influence viral inactivation, and unknown or unspecified details ? such as variability in virus titers, measuring devices, calibrations, and protocols ? can all influence log reduction values. This article series covers what you need to know to fully understand the properties of the test article, the viruses inactivated, and the critical control parameters for selected inactivation methods.