SNAP-Cell® TMR-Star is a red fluorescent substrate that can be used to label SNAP-tag® fusion proteins inside living cells, on cell surfaces, or in vitro.
- It is a cell-permeable substrate (CP-6-TMR) is based on the single isomer 6-carboxytetramethylrhodamine
- It is suitable for standard rhodamine filter sets
- It has an excitation maximum at 554 nm and an emission maximum at 580 nm
This package contains 30 nmol of SNAP-Cell TMR-Star substrate, sufficient to make 10 ml of a 3 µM SNAP-tag fusion protein labeling solution.
The SNAP-tag protein labeling system enables the specific, covalent attachment of virtually any molecule to a protein of interest. The SNAP-tag is a small protein based on mammalian O6-alkylguanine-DNA alkyltransferase (AGT). SNAP-tag substrates are derivatives of benzylpurines and benzylchloropyrimidines. In the labeling reaction, the substituted benzyl group of the substrate is covalently attached to the SNAP-tag.
There are two steps to using this system: subcloning and expression of the protein of interest as a SNAP-tag fusion, and labeling of the fusion with the SNAP-tag substrate of choice. Expression of SNAP-tag fusion proteins is described in the documentation supplied with SNAP-tag plasmids. The labeling of the fusion proteins with the SNAP-tag substrate is described below.
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