The state of Illinois plans to invest $3.5 million in a second business incubator for downtown Chicago, Crain's Chicago Business reported.The state-sponsored business incubator, which will house biotech and pharmaceutical startups, will be modeled on the highly successful 1871 incubator, www.1871.com, which has served as a base for dozens of emerging digital firms, Crain's reported. Illinois Gov. Pat Quinn is expected to announce in his State of the State speech Wednesday that the state's is making a $2.5 million grant and a $1 million loan to the center, which will occupy 25,000 square feet downtown, possibly at the Merchandise Mart.