Mammalian transient protein expression sales will expand through 2036, with expression vectors at 28.5% and bio-production at 40.0% of product type sales in 2026. The market was valued at USD 804.3 million in 2025, is projected to reach USD 1,449.4 million by 2036 and is forecast to record a 5.5% CAGR between 2026 and 2036.