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¡±The procedure for immunoprecipitation is outlined in Fig. 1. In the first step, cells are transfected with plasmids coding for a bait protein and its potential ligand, the target protein. These cells are lysed with a gentle detergenttreatment, creating a lysate containing bait¨Ctarget complexes along with many irrelevant proteins. A capture antibody that specifically recognizes the bait protein is added to the lysates, forming a new antibody¨Cbait¨Ctarget complex. The antibody is then used as a handle to immobilize the proteins on inert Sepharose beads that are covalently coupled to Protein A, which stably binds the constant regions of many types of antibodies. At this point, those proteins not immobilized on beads are removed by a series of washes. Finally, the bait-protein complexes are eluted from the beads and dissociated by boiling in SDS. The presence or absence of the target protein, which is the endpoint of the assay, is evaluated by Western blot.¡°¡ª¡ª¡ª¡ª¡ª¡ªHaian Fu edits ,Protein-Protein Interactions:Methods and Applications,Humana Press,2004£¬338.
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¡°Finally, the bait-protein complexes are eluted from the beads and dissociated by boiling in SDS. The presence or absence of the target protein, which is the endpoint of the assay, is evaluated by Western blot.¡°¡ª¡ª¡ª¡ª¡ª¡ªHaian Fu edits ,Protein-Protein Interactions:Methods and Applications,Humana Press,2004£¬338.¡±ÊÇÔÚÉÏͼµÄ×îºóÒ»²½;"The beads are then washed free of irrelevant proteins, and the antibody, bait, and target are eluted by boiling."µ°°×ÖÊ-µ°°×ÖÊÏ໥×÷Óû¹ÊÇÃâÒßʶ±ð£¬Èç¹ûÄܹ»ÊµÏÖ£¬¶¼ÔÚÖó·ÐÏ´ÍѺÍWB֮ǰ¾ÍÍê³ÉÁË£¬Èç¹ûµ°°×ÖÊ-µ°°×ÖÊÏ໥×÷Óû¹ÊÇÃâÒßʶ±ð£¬Èç¹û²»Äܹ»ÊµÏÖ£¬Öó·ÐÏ´ÍѺÍWB¾Í¸ü¼Ó²»»áʹµÃ"µ°°×ÖÊ-µ°°×ÖÊÏ໥×÷Óû¹ÊÇÃâÒßʶ±ðʵÏÖ¡£Çë¸ãÇå³þʵÑéÁ÷³ÌµÄ˳Ðò£¡
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