Species-related differences in the electrophoretic behavior of CP 29 and CP 26: an immunochemical analysis

The monomeric chlorophyll-protein complexes, CP 29 and CP 26 seen in the Camm and Green (1980) and Dunahay and Staehelin (1986) green gels do not always migrate in the order of the apparent molecular weight of their apoproteins as determined by denaturing gel electrophoresis. In barley and corn they...

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Bibliographic Details
Published in:Photosynthesis research 1992-11, Vol.34 (2), p.249-262
Main Authors: Falbel, T.G. (Colorado Univ., Boulder, CO (USA)), Staehelin, L.A
Format: Article
Language:English
Subjects:
ANTIBODIES
ANTICORPS
ANTICUERPOS
Biological and medical sciences
CHLOROPHYLLE
CHLOROPHYLLS
CLOROFILAS
ELECTROFORESIS
ELECTROPHORESE
ELECTROPHORESIS
FOTOSINTESIS
Fundamental and applied biological sciences. Psychology
Metabolism
MOLECULAR WEIGHT
PESO MOLECULAR
PHOTOSYNTHESE
PHOTOSYNTHESIS
Photosynthesis, respiration. Anabolism, catabolism
Plant physiology and development
POIDS MOLECULAIRE
PROTEINAS
PROTEINE
PROTEINS
SPINACIA
ZEA
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Summary:The monomeric chlorophyll-protein complexes, CP 29 and CP 26 seen in the Camm and Green (1980) and Dunahay and Staehelin (1986) green gels do not always migrate in the order of the apparent molecular weight of their apoproteins as determined by denaturing gel electrophoresis. In barley and corn they do, but in spinach they do not. In addition, in some higher plant species these chlorophyll-protein complexes comigrate on green gels causing confusion in the literature. To remedy this situation and circumvent future confusion, we propose that the CP 29 and CP 26 complexes be named according to the relative molecular weight of their apoproteins on denaturing gels. Our proposal is supported by the results obtained from four antibodies used on Western blot samples of whole thylakoids, grana membranes, and PS II preparations from different plants. The higher molecular weight proteins (proposed CP 29's) react strongly to one set of antibodies, and the lower molecular weight proteins (proposed CP 26's) react strongly to a different set. In spinach, CP 26 antibodies react also with CP 29, but the extent of the cross-reactivity depends critically on the gel electrophoresis system used. Accordingly, a lack of antibody reactivity under certain conditions may not indicate two proteins are unrelated, just simply that a particular epitope is no longer accessible following gel electrophoresis with a particular buffer system.
ISSN:0166-8595
1573-5079
DOI:10.1007/BF00033442