Fluorescent antibody signal. (Left) An example of a clear fluorescent signal (ex. 550 nm, em. 570 nm) of Cy3 marked anti-BAM to cantilever B and C and none on A and D; (Right) Fluorescent picture of Cy5 signal (ex. 650 nm, em. 670 nm) from chip 113, showing a low background signal of Cy5 marked unspecific mouse antibody .