Abstract
The chloroplast membrane proteins from four recessive nuclear gene mutants of barley were studied with sodium dodecyl sulfate gel electrophoresis. The protein patterns of two mutants,xantha-b 12 andviridis-zd 69, consist of a summation of the polypeptides present in the chloroplast and etioplast membranes of the wild type. The pattern ofviridis-c 12, a mutant deficient in photosystem II activity was lacking two bands, one of which is considered to be a component of the reaction center of photosystem II. The pattern ofviridis-k 23 lacked three chloroplast specific bands, two of which are components of chlorophyll-protein complex II. The results are discussed in relation to previously established functional and structural characteristics of the mutant plastids.
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