We examined the function of SULF2 in hOPCs following infection with lentivirus expressing SULF2 short hairpin RNA (shRNA)29, which significantly reduced SULF2 mRNA expression by 72.9 ± 4.7% (Supplementary Figure 5b) (p < 0.0001, n = 8 individual fetal samples). This evidence concerns the gene SULF2 and infection.