Interleukin-12 is a naturally occurring protein essential for the proper functioning of the human immune system. Having either too much or too little interleukin-12 may play a role in the development of many diseases, including some cancers and auto-immune disorders like Crohn's, psoriasis, and rheumatoid arthritis. In turn, modulating interleukin-12 levels could yield new therapies for those conditions. In an effort to create a new and cost-effective method for producing interleukin-12 and make more of the scarce protein available for research and therapeutic development, a team of scientists at Worcester Polytechnic Institute's Life Sciences and Bioengineering Center (WPI) and the...