Furthermore, we noted a special neutrophil subset of G5c2 (CD52+) in G5c cells, which was almost absent in UCB. CD52 was generally expressed on the surface of immune cells such as lymphocytes, eosinophils and natural killer cells, and is involved in graft-versus-host disease (28–30). Lin et al. The gene discussed is CD52; the disease is graft versus host disease.