CAP1 and cancer: Secondly, a protein atlas database generated from comparison of gene expression in normal tissues and human cancers at both protein and RNA levels (http://www.proteinatlas.org/ENSG00000131236-CAP1/cancer) shows that colorectal cancer had the highest percentage of cancer samples (over 50%) showing strong CAP1 staining, whereas in other cancer types percentage of cancer tissues with strong CAP1 staining was much reduced.