01 / The world before
Naturally occurring enzymes did not perform every desired reaction.
02 / The discovery
Repeated variation and selection improved enzyme properties.
03 / The people
Frances Arnold and many protein engineering researchers.
04 / The obstacles
Environmental and industrial claims need context-specific measurement.
05 / The world after
Engineered enzymes expanded biotechnology options.
06 / Why it still matters
Biological tools can change manufacturing methods.