HaloTag PEG4 TMR Ligand



5-10 business days

HaloTag is a self-labeling protein derived from the haloalkane dehalogenase DhaA from Rhodococcus rhodochrous. Its active site reacts with chloroalkane substrates to form an irreversible bond. The covalent linkage between the HaloTag ligand and HaloTag protein enables rapid isolation and purification. HaloTag PEG4 TMR Ligand (555Ex/585Em) can be used for protein fluorescent lableing. Compared with regular HaloTag Ligand, this product contains a PEG4 linker instead of PEG2.

Product Name HaloTag PEG4 TMR Ligand
Synonyms TMR-PEG4-Halo
CAS Number
Related CAS
Molecular Formula C39H50ClN3O8
Molecular Weight 724.29
Purity (HPLC) >= 95%
Physical Appearance Dark Solid
Optical Properties Abs/Em Maxima: 555/585 nm
Solubility DMSO, DMF
Shipping Conditions Shipped on gel packs
Storage Conditions Store at -20°C and protected from light
Shelf Life 12 months after the date of delivery
Regulatory Statement For Research Use Only


Wilhelm, J., Kuhn, S., Tarnawski, M., Gotthard, G., Tunnermann, J., Tanzer, T., Karpenko, J., Mertes, N., Xue, L., Uhrig, U., Reinstein, J., Hiblot, J., & Johnsson, K. (2021). Kinetic and Structural Characterization of the Self-Labeling Protein Tags HaloTag7, SNAP-tag, and CLIP-tag. Biochemistry, 60(33), 2560–2575. https://doi.org/10.1021/acs.biochem.1c00258



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