5-Carboxy-X-rhodamine N-succinimidyl ester

ROX NHS ester, 5-isomer is a ROX dye linker that is commonly used for oligonucleotide labeling. The NHS ester can react specifically and efficiently with primary amines such as the side chain of lysine residue or aminosilane-coated surfaces at neutral or slight basic conditions to form a covalent bond.

5-Carboxy-X-rhodamine N-succinimidyl ester is a nucleotide labeling reagent.