ATTO MB2 (Figure 1) derives from of the dye Methylene Blue and it presents a moderate hydrophilicity. Atto MB2 represents an excellent alternative to Methylene Blue.
![](https://www.metabion.com/uploads/5-Atto-MB2-Ester.png.pagespeed.ce.R9v4Q0t8Wo.png)
Figure 1. Structure of 5'-Atto MB2 (R = sequence).
metabion offers the Atto MB2 modification in its DNA and RNA portfolio (as a 5'-, 3'- or internal modification):