Abstract From genomics to proteomics, and then to mini RNA, all without exception showed that proteins are the substance which directly regulate life. Comparing with genomics, study of proteins is more difficult for its great variety, complicated modification and complicated construction. Recently, some new techniques for protein assay and research have provided us, e.g. Fluorescence labeling, SELDI, SPR and optical protein chip, of these, SELDI SPR and optical protein chip are label-free.
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