UBE2I and asthma: Clara cell 10 kDa protein (CC10)-, SAE1-, SAE2-, and UBC9-derived immunosignals were robustly detectable, and the apparent overlapping immunosignals from CC10 and SUMOylation machinery components were readily observed in the BALF cells of children with asthma but not in those with FBA (Fig. 1b, c).