Growth of the wild type, parent strain (JWCB018), and E1 expression strain (JWCB052) on cellobiose. Growth of the wild type (black circles); JWCB018, ΔpyrFA
ldh::ISCbe4 Δcbe1 (blue squares); and JWCB052, ΔpyrFA
acel0614 (E1) (red triangles) strains on cellobiose. a Growth at 65 °C and b growth at 75 °C.