Ultrahigh spacing tissue arrays for screening hybridoma by immunohistochemistry.

We present a technology to make ultrahigh spacing tissue arrays (USTA) which facilitates screening hybridoma by immunohistochemistry, results in easier performance of staining and image analysis, minimal sample mixed-up and less bookkeeping efforts. 32 array cores are designated a 4 x 8 microarray, leaving 4 mm spacing between two adjacent array elements. After separated each array spot with PAP pen, one USTA is sufficient for testing of supernatants from 32 different hybridomas.