Abstract
A new glycoprotein of 31,500 dalton, which has a high affinity for ouabain, and is independent of (Na+-K+)-ATPase, was solubilized from transverse tubule membrane and junctional sarcoplasmic reticulum complexes (TTM-JSR) of cat cardiac muscle. This protein could be extracted only in small amounts from sarcolemma-plasma membrane (SLM-PL) fragments, suggesting that it indeed originates from the TTM-JSR.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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Cats
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Cell Membrane / metabolism*
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Cell Membrane / ultrastructure
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Heart Ventricles / metabolism
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Membrane Glycoproteins / isolation & purification
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Membrane Glycoproteins / metabolism*
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Microtubules / metabolism*
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Microtubules / ultrastructure
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Molecular Weight
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Myocardium / metabolism*
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Myocardium / ultrastructure
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Ouabain / pharmacology*
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Sarcoplasmic Reticulum / metabolism*
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Sarcoplasmic Reticulum / ultrastructure
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Solubility
Substances
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Membrane Glycoproteins
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Ouabain