Taylor RK, LaPointe CF (2000). "The type 4 prepilin peptidases comprise a novel family of aspartic acid proteases." J. Biol. Chem.275 (2):1502-10. doi:10.1074/jbc.275.2.1502. PMID: 1455179.
Jarrell KF, Bardy SL (2003). "Clevage of preflagellins by an aspartic acid signal peptidase is essential for flagellation in the archaeon Methanococcus voltae". Mol. Microbiol.50 (4): 1339-1347. doi: 10.1046/j.1365-2958.2003.03758.x. PMID: 14622420.
Sielecki AR, Fujinaga M, Read RJ, James MN (June 1991). "Refined structure of porcine pepsinogen at 1.8 A resolution". J. Mol. Biol.219 (4): 671-92. doi: 10.1016/0022-2836(91)90664-R. PMID: 2056534.
Taylor RK, LaPointe CF (2000). "The type 4 prepilin peptidases comprise a novel family of aspartic acid proteases." J. Biol. Chem.275 (2):1502-10. doi:10.1074/jbc.275.2.1502. PMID: 1455179.
Jarrell KF, Bardy SL (2003). "Clevage of preflagellins by an aspartic acid signal peptidase is essential for flagellation in the archaeon Methanococcus voltae". Mol. Microbiol.50 (4): 1339-1347. doi: 10.1046/j.1365-2958.2003.03758.x. PMID: 14622420.
Sielecki AR, Fujinaga M, Read RJ, James MN (June 1991). "Refined structure of porcine pepsinogen at 1.8 A resolution". J. Mol. Biol.219 (4): 671-92. doi: 10.1016/0022-2836(91)90664-R. PMID: 2056534.