Peaks at similar mass - to - charge ratios ( clusters ) are identified across spectra ( figure 2 ) and relatie signal amplitude differences are compared using sophisticated pattern recognition software to identify expression patterns that uniquely characterize specific diseases or conditions 质谱图中具有相似质荷比的峰(群)及相对信号强度的差异可以通过高级模式识别软件分别得到鉴定和比较，从而鉴定出某一特定疾病或身体状态的独特蛋白表达模式。
