The invention is directed to a releasable conjugate comprising a biotinylated ligand having a biotin moiety, a ligand moiety (Ligand1) and a biotin-binding molecule (bbm) bound to the biotin moiety of the biotinylated ligand. The ligand moiety of the biotinylated ligand may be separated by a spacer group consisting of polyethylene glycol. Furthermore, the invention relates to a method for cleaving the releasable conjugate by providing biotin or streptavidin and an auxiliary release agent in a sufficient concentration to displace the biotin-binding molecule (bbm) from the biotin moiety of the biotinylated ligand and a method for separation of target cells from a cell sample utilizing the conjugate.
本发明涉及一种可释放的共轭物,包括具有
生物素分子的
生物素化
配体、
配体分子(Ligand1)和与
生物素化
配体的
生物素分子结合的
生物素结合分子(bbm)。
生物素化
配体的
配体基团可由聚
乙二醇组成的间隔基团隔开。此外,本发明还涉及一种通过提供足够浓度的
生物素或
链霉亲和素和辅助释放剂,使
生物素结合分子(bbm)从
生物素化
配体的
生物素分子中置换出来,从而裂解可释放共轭物的方法,以及利用该共轭物从细胞样本中分离靶细胞的方法。