Disclosed herein, in certain embodiments, is a selective transport molecule with increased in vivo circulation. In some embodiments, a selective transport molecule disclosed herein has the formula (A-X-B-C)-M, wherein C is a cargo moiety; A is a peptide with a sequence comprising 5 to 9 consecutive acidic amino acids, wherein the amino acids are selected from: aspartates and glutamates; B is a peptide with a sequence comprising 5 to 20 consecutive basic amino acids; X is a linker; and M is a macromolecular carrier.
在某些实施方案中,本文公开了一种体内循环增加的选择性转运分子。在某些实施方案中,本文公开的选择性转运分子具有式(A-X-B-C)-M,其中 C 是货物分子;A 是
多肽,其序列包括 5 至 9 个连续的酸性
氨基酸,其中
氨基酸选自
天冬氨酸和谷
氨酸;B 是
多肽,其序列包括 5 至 20 个连续的碱性
氨基酸;X 是连接体;M 是大分子载体。