Fluorescein cadaverine is a popular fluorescent transglutaminase substrate to label proteins by transaminidation. It has also been used to prepare other small fluorescent biomolecules via amidation or reductive amination.
Summey BT, Jr et al. (2002). Tissue transglutaminase localization and activity regulation in the extracellular matrix of articular cartilage. J Orthop Res 20, 76-82; Heath DJ, et al. (2001). Characterization of tissue transglutaminase in human osteoblast-like cells. J Bone Miner Res 16, 1477-85.