A review.In the past 15 yr, the process of drug discovery has changed dramatically.The revolution has been fueled by mol. biol., genomics and the advent of automated screening.The traditional biol. skills of pharmacol. and biochem. appear to be under threat in this new era, but is this threat real or do the traditional disciplines still have an important role to play This article is a personal review of the role of biol. in the drug discovery process and how this has changed with time.