4-(N-Phthalimidoyl)butanoic acid (compound FB) is a hapten with a carboxyl group at the end of its spacer arm, suitable for reacting with free amine groups of proteins. 4-(N-Phthalimidoyl)butanoic acid can be combined with carrier proteins and used in antigen design.
[1]. Mercader JV, et al. Development of monoclonal ELISAs for azinphos-methyl. 1. Hapten synthesis and antibody production. J Agric Food Chem. 1999 Mar;47(3):1276-84.
















