Cereal Chem 57:97 - 105.  |  VIEW ARTICLE
Fractioning Barley Proteins by Computer Factor Analysis.

H. Martens and K. E. Bach Knudsen. Copyright 1980 by the American Association of Cereal Chemists, Inc. 

The amino acid composition of six related barley varieties was studied as a function of N-fertilizer level. The amino acid spectra of a "storage protein group" and a "nonstorage protein group" were determined for each mutant by factor analyses of the whole grain amino acid data expressed in different units. The amounts of these two "protein groups" at five fertilizer levels were calculated by regression analysis. The results were compared with those for chemically obtained protein solubility fractions. Varietal differences were greater in the storage protein group than in the nonstorage group. Two principally different high-lysine characteristics were observed in the storage protein group: a gradual shift from hordeins towards glutelins and a drastic replacement of hordeins by proteins of the albumin/globulin type of composition.