Abstract
Antisera were raised against two forms of α-1,4-glucan phosphorylase (EC 2.4.1.1) which had been purified from leaves of Spinacia oleracea L. Immunoglobulin G preparations were isolated from the antisera, and their specificity was ensured by immunoplobulin G preparations were used for in situ localization of the two phosphorylase forms in spinach leaf thin sections by indirect immuno-fluorescence. Both enzyme forms were present in the palisade and spongy parenchyma and in the guard cells, but their intracellular distribution was complementary. One phosphorylase form (designated as the chloroplastic form) was restricted to the stromal space of chloroplasts whereas the other (the non-chloroplastic form) was present only in the cytoplasm of chloroplast-containing cells. Thus, the phosphorylases represent two distinct compartment-specific enzyme forms which reside within the same photosynthetically active mesophyll cell.
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Abbreviations
- DBM:
-
diazobenzyloxymethyl
- FITC:
-
fluorescein isothiocyanate
- IgG:
-
immunoglobulin G
- PMSF:
-
phenylmethylsulfonyl fluoride
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Schächtele, C., Steup, M. α-1,4-Glucan phosphorylase forms from leaves of spinach (Spinacia oleracea L.) I. In situ localization by indirect immunofluorescence. Planta 167, 444–451 (1986). https://doi.org/10.1007/BF00391219
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DOI: https://doi.org/10.1007/BF00391219