Combining the visual power of standard immunostaining with the broad scope of the protein array, the Staining Antibody Array from Worcester, Mass.-based Hypromatrix
http://www.hypromatrix.com allows researchers to stain different cells in the same sample for dozens of proteins simultaneously. The array, containing about 100 antibodies fixed on a nitrocellulose membrane, is incubated with the tissue to be stained. When the array is removed, the antibodies remain bound to proteins in the tissue and can be detected using secondary antibodies.