* This directory contains labeled spectrum images, one for each modification reported in the manuscript

* The name of the image tells the modification that it corresponds to. For example
  D46-SO_0226.png  represents a modification of mass 46 on D (Aspartate) in the ORF SO_0226.
  
* Corresponding dta file for the spectrum is also provided. It has the same name
  with a .dta extension (e.g. D46-SO_0226.dta). The dta file tells the mass and charge
  of the precuror and list of fragment ions and intensities.