Actin capping proteins, CapZ (β-actinin) and tropomodulin in amphioxus striated muscle

► Amphioxus possess two CAPZ genes and one TMOD gene. ► The sequences of amphioxus CapZα and β (β-actinin I and II) and Tmod were determined. ► CapZ (β-actinin) and Tmod are expressed in amphioxus striated muscle.