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The extracellular environment mainly contains Cu 2+ , while the intracellular environment mainly contains Cu + ( 2+ functions by binding and regulating growth factors and cell membrane receptors in the extracellular environment, while Cu + exists on the cell membrane and directly regulates kinase activity to alter the activation state of growth factor membrane receptors through structural modification and inhibition of phosphatase function

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The effect of age on concentrations of monoamines, amino acids, and their related substances in the cer.ebrospinal fluid

After cleavage, poly(A) polymerase adds a tail of adenine residues to the newly created 3 end