Properties of protein powder prepared from Cape hake by-products

► Hake protein powder is a source of high-quality fish protein. ► Gelling capacity of hake protein powder can be improved by adding MTGase. ► Hake protein powder had low emulsifying, foaming capacity and solubility. ► Gels had a typical pattern of myofibrillar protein networks. ► Higher protein concentration induced an increasing complexity of the gel structure.