Plant expression systems are used when animal-free recombinant protein products are required. Compared to traditional microbial or animal cell systems, the animal-free plant expression systems greatly reduce the risk of contamination with animal-origin pathogens. Furthermore, plant production possesses superior advantages in storage, distribution and scale-up.Profacgen provides a high capacity rice grain (Oryza sativa L.) expression system. It is a robust and flexible expression system that allows the expression of both short peptides (shorter than 100 amino acids) and large recombinant proteins (up to 1000 amino acids). The rice grain system uses rice endosperm cells as the host and rice farming for scaling up production.http://www.profacgen.com/Animal-free-Expression.htm