ROTI ® Black N for electrophoresis Kit for ultra-sensitive and reproducible staining of DNA in polyacrylamide gels. Ultra-sensitive Easy-to-follow guide Transparent gel Detection limit for DNA is <0.1 ng/mm 2 . ROTI ® Black N is, therefore, an excellent alternative to using radioactivity or bioluminescent systems. ROTI ® Black N results in an intensive staining of nucleic acids, yet the gel matrix remains highly transparent. The ROTI ® Black N Kit comes with an easy to follow protocol that guarantees you reliable results. The kit contains Silver nitrate (Art. No. N770), formaldehyde (Art. No. N771), sodium thiosulphate (Art. No. N772), sodium carbonate (Art. No. N774), and stop solution (Art. No. N773). Contents of this Kit may not be bought separately. Shipped without racket.