3.4.23.B2	Simian immunodeficiency virus proteinase	preliminary BRENDA-supplied EC number	
3.4.23.B20	HycD peptidase	preliminary BRENDA-supplied EC number	
3.4.23.B24	signal peptide peptidase	preliminary BRENDA-supplied EC number	
3.4.23.B25	thermopsin-like protease SSO1175	preliminary BRENDA-supplied EC number	
3.4.23.B3	equine infectious anemia virus proteinase	preliminary BRENDA-supplied EC number	
3.4.23.B4	Feline immunodeficiency virus protease	preliminary BRENDA-supplied EC number	
3.4.23.B5	murine leukemia virus protease	preliminary BRENDA-supplied EC number	
3.4.23.B6	Mason-Pfizer monkey virus proteinase	preliminary BRENDA-supplied EC number	
3.4.23.B8	human T-cell leukemia virus type 1 protease	preliminary BRENDA-supplied EC number	
3.4.23.B9	bovine leukemia virus protease	preliminary BRENDA-supplied EC number