title: Immunochemical studies on barley seed storage proteins : The specificity of an antibody to 'C' hordein and its reaction with prolamins from other cereals.
abstract: The antigenic relationships between the prolamins of barley, rye and wheat have been studied by examining the specificity of an antibody to 'C' hordein in a quantitative study using a laser nephelometer. The antibody reacts weakly with 'B' hordein and strongly with 75-kdalton and 40-kdalton γ-secalins from rye and γ3 some ω-gliadins from wheat. Absorption experiments and immunodiffusion tests indicate that there are shared antigenic determinants for most of the prolamins. All the species with reacting prolamins belong to the sub-family Festucoideae of the Gramineae. The prolamins of maize, pearl millet and sorghum, species of the sub-family Panicoideae, do not react. The results confirm the known lack of homology between the prolamins of the two sub-families and also indicate the presence of relationships not yet established between 'C' hordein, the 75-kdalton and 40-kdalton γ-secalins and also γ3 gliadin.
authors.affiliation: Biochemistry Department, Rothamsted Experimental Station, AL5 2JQ, Harpenden, Herts, UK.
authors.forename: G N
authors.initials: GN
authors.lastname: Festenstein
authors.forename: F C
authors.initials: FC
authors.lastname: Hay
authors.forename: B J
authors.initials: BJ
authors.lastname: Miflin
authors.forename: P R
authors.initials: PR
authors.lastname: Shewry