琥珀酰亚胺基 3-马来酰亚胺丙酸酯 (SMP，BMPS) 用作脂肪族异双功能交联剂试剂。用于诸如酶免疫测定前半抗原与酶交联或荧光底物与肽抗原交联等技术，用于荧光免疫测定 3-Maleimido-propionic NHS ester contains a maleimide group and an NHS ester. The NHS ester can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol.