An illustration of the more advanced features of the Mason viewer. In this example, five mason viewers are loaded on a single web page, each depicting a different type of sequence annotation data. The top-most viewer, with red blocks, illustrates a single mason viewer loaded with multiple rows. Each row depicts the peptide coverage for this protein from multiple mass spectrometry proteomics experiments. The summary bar on the right-hand side of the rows indicates the total protein sequence coverage in each experiment. The viewer with the purple bars indicates the peptide coverage for the same protein from the PeptideAtlas  resource of proteomics experiments. The viewer with yellow bars indicates predicted transmembrane regions. The viewer with green and blue bars depicts the predicted secondary structure for that protein. The viewer with cyan bars indicates predicted coiled-coils in that sequence. And, the viewer with black bars indicates the predicted disordered regions in that protein. The vertical lines present in the same position in all viewers represent the boundaries of the feature annotation the mouse pointer is currently on. And the tooltip present next to the mouse pointer is presenting information about that annotated feature.