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  • membrane
  • The receptors P2Y 4 , P2Y 11 and likely P2X 1 were present intracellularly or in the plasma membrane of muscle fibres and were thus selected for further detailed morphological analysis. (springer.com)
  • abundantly
  • P2Y 11 receptors were abundantly and diffusely expressed intracellularly and were more explicitly expressed in type I than in type II fibres, whereas P2X 1 and P2Y 4 showed no fibre-type specificity. (springer.com)