A review.A case study of the anal. development of an early-phase protein pharmaceutical is presented.Anal. method development was required not only for support of early formulation development, but also for early stability studies and for final release assays.Methods based on seven different techniques were developed for support of formulation development and for validation as product release assays.These techniques included sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), UV-Vis, isoelec. focusing, anion-exchange chromatog., reverse-phase chromatog., size-exclusion chromatog., and Western blot.