The 'cloud' provides an amusing way to visualize all the sequences of the database for a given species. Once a species is chosen, an image-map plot is created showing the Z-score with respect to Minimum Free Energy for every entry in the database (with some limits). The horizontal black line shows the mean Z score of all sequences in the current set while the vertical line shows the mean MFE. For the purposes of the PRFdb, it is unlikely that sequences with MFEs or Zscores greater than the mean are of interest, thus all the fun sequences are colored red. Grey lines provide a measurement of one standard deviation more fun than mean. Darker dots mean more sequence windows share a given MFE,Zscore coordinate. Clicking a dot brings up a quick summary of all sequence windows which share that MFe,Zscore coordinate.