In contrast, when His-CATB was diluted in MCM from HIV-1 infection with relative low levels of HIV-1 p24 titer (11,503 pg/mL), the number of PE-positive neurons was lower (15.82%) than uninfected MCM (60.20%; p = 0.0426) (Fig. 3Ab,C). Here, TYRP1 is linked to HIV-1 infection.