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Planta. 1974 Jan;120(3):311-6. doi: 10.1007/BF00390300.

Heavy meromyosin complexing filaments in the phloem of Vicia faba and Xylosma congestum.

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  • 1Department of Botany, University of California, 95616, Davis, California, USA.


Stem sections of Vicia faba L. were incubated with rabbit-muscle heavy meromyosin (HMM) and HMM complexes with phloem filaments (P-protein) were observed with the electron microscope. Treatment of sections of Vicia faba and of Xylosma congestum (Lour.) Merr. with fluorescent HMM resulted in a weak fluorescence of the phloem region. Inasmuch as HMM-binding is believed to be specific for actin-like proteins, it is proposed to classify P-protein as such.

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