The biotechrabbit RTS 100 Wheat Germ Kit is a batch screening system allowing rapid protein expression within 2.5 hours. The kit allows use of a broad range of nonoptimized T7 promoter-based expression vectors from prokaryotic and eukaryotic origin in addition to established cell-free wheat germ vectors or linear templates. Using this approach, multiple constructs — including vectors that have not been optimized for wheat germ — can be screened rapidly for expression and functionality in parallel. The procedure saves precious time otherwise required for template generation. The new batch system yields up to 100 μg protein per ml reaction, which is sufficient for many downstream applications.