Last year David Hanson and I began collaboration continuing his study in leaf respiration. I wrote a custom R package to process data from his tunable diode laser (TDL) and Licor devices to understand how carbon is taken up and respired by leaves. This summer a poster presenting some of what we’ve been learning was presented by graduate student, Dianne Pater, who has been designing and running experiments. DT Pater, EB Erhardt, and DT Hanson. Isotopic signature of photorespiration. In Joint Annual Meetings of the American Society of Plant Biologists and the Canadian Society of Plant Physiologists, Montreal, CA, August 2010.