Carboxypeptidase I from triticale grains and the hydrolysis of salt-soluble fractions of storage proteins

► Carboxypeptidase I (CP I) was purified from triticale grains. ► The enzyme is a serine CP that hydrolyze hydrophobic substrates in low pH. ► Triticale CP I is a homodimer, each subunit is built of 2 polypeptide chains. ► The gene encoding triticale CP I is synthesised mainly in scutellum.► CPs degraded products of preliminary hydrolysis of albumins and globulins by EP8.