Most millets are classified with maize, sorghum and Coix (Job's tears) in the grass sub-family Panicoideae, but two species, tef and ragi (finger millet) are placed in a separate sub-family, the Chloridoideae. In all species the major storage proteins are alcohol-soluble prolamins, but their properties vary. For example, although the kafirins of sorghum are closely related to the zeins of maize...