LY6S and colitis: Because the expression of Ly6a (Sca1) is known to be induced by colitis and radiation-induced damage, as well as damage caused by helminth infections (Nusse et al, 2018; Yui et al, 2018), we checked whether the expression of Ly6a (Sca1) was also affected in vivo in MycΔ2-540/Δ2-540 mice after radiation damage.