Capping protein (actin filament) muscle Z-line alpha 1 Tags: Protein.F-actin-capping protein subunit alpha-1 is a protein that in humans is encoded by the CAPZA1 gene.CAPZA1 is a member of the F-actin capping protein alpha subunit family. This gene encodes the alpha subunit of the barbed-end actin binding protein. EntrezGene 829 Learn more... Loading...