CSE1L and colorectal cancer: Immunoblotting with anti-CSE1L antibodies (clone 24) showed that hypo-phosphorylated CSE1L was highly expressed in HT-29 colorectal cancer cells and B16F10 melanoma cells and was nearly undetectable in human foreskin fibroblast cells and NIH 3T3 mouse embryo fibroblast cells cultured under serum starvation (Figure 1d).