Effect of incubation temperature on the forms of RSDA expressed from E. coli (pARMH) as shown by Coomassie brilliant blue staining (A) and Western blotting (B). S, cytoplasmic soluble fraction; I, cytoplasmic insoluble fraction. Lanes M, low-molecular-weight standard; lanes S, purified RSDA from the Cytophaga sp.; lanes 1 and 2, cell lysates of E. coli DH5α and E. coli DH5α(pAcUW21), respectively; lanes 3, 5, 7, and 9, soluble fractions of the E. coli DH5α(pARMH) cell lysate at the indicated temperatures (in degrees Celsius); lanes 4, 6, 8, and 10, insoluble fractions of the E. coli (pARMH) cell lysate at the indicated temperatures.