> We have DDA nLC-MSMS data from QE-Plus. We have a heterogenous modification of Ser that Mascot is failing to identify. Can anyone recommend software that handles this problem ? Any and all advice will be appreciated. Kym Francis Faull, Ph.D. Director, Pasarow Mass Spectrometry Laboratory Jane and Terry Semel Institute for Neuroscience and Human Behavior at UCLA Professor Emeritus on Recall, Department of Psychiatry and Biobehavioral Sciences David Geffen School of Medicine at UCLA Telephone: (310) 206 7881 (office) Telephone: (310) 206 7886 (laboratory) Facsimile: (310) 206 2161 Electronic mail: <email obscured> <email obscured>>