Direct red 81 is a highly conjugated organic dye that has been reported to stain proteins in SDS-PAGE gels. Other direct dyes offered include: Direct Red 23 (sc-214909), Direct Red 80 (sc-214910), Direct Yellow 27 (sc-214913), Direct yellow 50 (sc-214914), Direct Blue 15 (sc-214908), Direct Blue 71 (sc-218247) and Direct Violet 51 (sc-214912).
1. Achilonu, I. and Goldring, J.P. 2010. Anal. Biochem. 400: 139-141. PMID: 20060376