Shieh P, M Siegrist S, Cullen AJ, Bertozzi CR.  2014.  Imaging bacterial peptidoglycan with near-infrared fluorogenic azide probes.. Proc Natl Acad Sci U S A. 111(15):5456-61.

Swarts BM, Holsclaw CM, Jewett JC, Alber M, Fox DM, M Siegrist S, Leary JA, Kalscheuer R, Bertozzi CR.  2012.  Probing the mycobacterial trehalome with bioorthogonal chemistry.. J Am Chem Soc. 134(39):16123-6.