The Small Molecule Mass Spectrometry Facility at the FAS Center for Systems Biology offers support for the analysis of a wide variety of analytes using mass spectrometry based techniques. We are located in the second basement (B2) level of the Northwest Laboratory building at 52 Oxford Street, Cambridge, MA 02138.  We provide services for molecular formula confirmation (accurate mass measurement), structural elucidation (MS/MS) and quantitation of small molecules.  In addition, we can assist you in the mass analysis of a wide variety of non-proteomics samples including metabolites, medium sized proteins and oligonucleotides.  Please contact us and tell us about your samples prior to submission or use of our Open Access laboratory.  We would love to hear from you and help you with your particular sample analysis needs. You can call us at (617) 384-9485 or email us at