Question: You have several cell lysates and want to determine which of them contain protein X in its phosphorylated form (with phosphorylation occurring on a tyrosine

You have several cell lysates and want to determine which of them contain protein X in its phosphorylated form (with phosphorylation occurring on a tyrosine residue). You have two antibodies: One recognizes phosphotyrosine and the other recognizes protein X. Describe how you would analyze the cell lysates for the presence of phosphorylated protein X using just these two antibodies.

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