ArrayList<String> enzymes = new ArrayList<String>();
PrideXmlReader prideXmlReader = new PrideXmlReader(currentPrideDataFile);
Description description = prideXmlReader.getDescription();
DataProcessing dataProcessing = description.getDataProcessing();
if (dataProcessing != null && dataProcessing.getProcessingMethod() != null) {
List<CvParam> processingMethods = dataProcessing.getProcessingMethod().getCvParam();
for (CvParam cvParam : processingMethods) {
if (cvParam.getAccession().equalsIgnoreCase("PRIDE:0000161")) { // fragment mass tolerance
String value = cvParam.getValue().trim();
if (value.indexOf(" ") != -1) { // escape Da or ppm