 SUMMERVILLE, S.C.--BUSINESS WIRE--South Carolina Research Authority SCRA announced that a company in which its affiliate, SC Launch, Inc., has an investment, Proterra Inc. Proterra, began trading its common stock and warrants on Nasdaq Global Select Market this week under the stock ticker symbols of PTRA and PTRAW. Proterra is a leading innovator in commercial vehicle electrification technology. The SC Launch, Inc. investment dates back to the early days of Proterra. Based on the prom 