Human SH-SY5Y cells stained with antibody to fibrillarin in green, neurofilament NF-H in red and DNA in dark blue, The fibrillarin antibody binds to spots in the nucleus corresponding to nucleoli. The nucleoli also contain DNA and so appear as pale blue dots. The neurofilament NF-H antibody binds to cytoplasmic intermediate or 10nm filaments. Image and antibodies by EnCor Biotechnology Inc.