Cen et al. (2003) confirmed that UNC119 interacts with IL5RA in eosinophils by coimmunoprecipitation experiments. They found that UNC119 also interacts, through its C- and N-terminal motifs, respectively, with the SH2 and SH3 domains of Src family kinases, such as LYN (165120) and HCK (142370), thereby inducing catalytic activity of the kinases