The present invention relates to the field of identifying proteins and peptides, and more specifically large-scale sequencing of single peptides in a mixture of diverse peptides at the single molecule level. The present invention also relates to methods for identifying amino acids in peptides, including peptides comprising unnatural amino acids. In one embodiment, the present invention contemplates labeling the N-terminal amino acid with a first label and labeling an internal amino acid with a second label. In some embodiments, the labels are fluorescent labels. In other embodiments, the internal amino acid is Lysine. In other embodiments, amino acids in peptides are identified based on the fluorescent signature for each peptide at the single molecule level.
本发明涉及蛋白质和肽的鉴定领域,更具体地说是在单分子
水平上对多种肽混合物中的单个肽进行大规模测序。本发明还涉及识别肽中
氨基酸的方法,包括包含非天然
氨基酸的肽。在一个实施方案中,本发明考虑用第一标签标记 N 端
氨基酸,用第二标签标记内部
氨基酸。在某些实施方案中,标签是荧光标签。在其他实施方案中,内部
氨基酸是赖
氨酸。在其他实施方案中,肽中的
氨基酸是根据单分子
水平上每个肽的荧光特征来识别的。