主要用于全蛋白扫描,为筛选线性或连续性表位提供理想工具。根据目的蛋白或长肽设计关键短肽序列,可用来鉴定蛋白活性、免疫特异性以及抗体结合性。重叠肽库的设计主要由肽链长度和步移(offset number)两个参数决定,从目的蛋白N端逐步向C端截取设计,每次转移一个或几个氨基酸,序列之间有部分重合,最终形成重叠肽库。
选择合适的步移和肽段长度可以降低实验成本,同时使数据价值最大化。步移通常设计为肽段长度的1/3。长肽段会包含更多的表位,但是一般这类肽段很难合成,并且库中包含的肽段变少。短肽段更容易合成,也更便宜,但每肽段的表位较少。短步移数和短肽组合可以形成最多数量的多肽,而长步移数与长肽组合产生的多肽数量最少。
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