AF 488 maleimide is a thiol-reactive dye for labeling of protein SH groups, and it can be used to attach AF 488 fluorophore to proteins and peptides containing cysteine residues, as well as to other thiolated molecules. AF488 exhibits the λem and λex wavelength of 520 nm and 470 nm, respectively.
References:
[1]. Ellison CK, et al. Real-time microscopy and psical perturbation of bacterial pili using maleimide-conjugated molecules. Nat Protoc. 2019 Jun;14(6):1803-1819.
[2]. Chakraborty S, Hu S Y, Wu S H, et al. The interaction affinity between vascular cell adhesion molecule-1 (VCAM-1) and very late antigen-4 (VLA-4) analyzed by quantitative FRET[J]. PLoS One, 2015, 10(3): e0121399.