PI4K2A and colon adenocarcinoma: Next, we found that the S47 site of PI4K2A protein was phosphorylated in COAD patients (p < 0.05; Figure 2F) and that S47 site phosphorylation in PI4K2A correlated with histological Mucinous classification (p < 0.05; Figure 2G) and stage III (p < 0.01; Figure 2F).