Abstract
Proteins from chloroplast and cytoplasmic ribosomes of Chlamydomonas reinhardi were mapped by a two-dimensional gel electrophoresis system which also permitted their molecular weights to be determined. Estimates of the numbers of proteins in the ribosomal subunits are: small chloroplast, 22; small cytoplasmic, 26; large chloroplast, 26; large cytoplasmic, 39. Two pairs of proteins of the small subunits and four pairs of the large subunits had similar electrophoretic mobilities in both dimensions.
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