Figure 4

An illustration of lines noting positions of interest and how an options menu can be used with the Mason viewer. In this example, a single Mason viewer depicting the peptide coverage for a single protein from multiple mass spectrometry proteomics experiments is shown. In the experiments, the proteins have been digested with trypsin and the green vertical lines represent positions in the protein’s sequence that contain the trypsin cut motif. The expectation is that all peptides should be terminated on both ends by a trypsin cut site. The presence of the green lines is controlled via an options menu, which is not itself a part of Mason, but can interact with the Mason viewer via Javascript function calls. In this case, checking the “Show Trypsin cut points” checkbox toggles the green vertical lines on and off by calling functions in the Mason core.