Schematic representations of the recombinant proteins used in this study. In shorthand notation for the engineered enzymes, the numbers 5, 10, 11, and 48 refer to the corresponding glycoside hydrolase (GH) family (GH5, GH10, GH11, and GH48) of the catalytic module; uppercase letters B, F, T, and A indicate the source of the cohesin module and lowercase letters b, f, t, and a indicate the source of the dockerin module from B. cellulosolvens, R. flavefaciens, C. thermocellum, and A. cellulolyticum, respectively. The source of the representative module (see key) is also indicated by color as follows: mint green or powder blue, T. fusca xylanase or cellulase, respectively; yellow, B. cellulosolvens; green, R. flavefaciens; red, C. thermocellum; lavender, A. cellulolyticus.