Rectangular cladogram of the 15 human cyclophilin proteins aligned. If one were to drop vertical lines, as in Figure 2, one might name: PPIL1 through to PPIL6 as CYNIA1 through to CYNIA4, and CYNIB1 and CYNIB2, respectively; PPIB and PPIC as CYN2A1 and CYN2A2, respectively; PPIE, PPIF, PPIA and PPIAL3 as CYN2C1, CYN2C2, CYN2C3 and CYN2C4, respectively; PPIG as CYN3; and so on.