IGEM:University of Chicago/2009/Notebook/Paraoxon Biosensor/2009/07/21

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July 21st, 2009 Growth assay using delta35 cultures 5. Set up: dilute 1:100 in YPD and YPD + 0.5 mM paraoxon. Assay used by schofield, actual [] is 4.6 5.5 ml cultures - (+) paraoxon - ul 20 mM paraoxon = 125 ul - ul YPD 4875 ul - culture 500 ul - total = 5.5 ml - (-) paraoxon - ul 20 mM paraoxon = 0 ul - ul YPD 5000 ul - culture 500 ul - total = 5 ml Start at 10:35. Take at least 6 time points OD time points - (+) paraoxon - 10:35 = 0.014 - 12:05 = 0.030 - 1:45 = 0.043 - 4:05 = 0.207 - 6:00 = 0.546 July 22nd reading : 10:00 a.m. = 1.559 - (-) paraoxon - 10:35 = 0.012 - 12:05 = 0.030 - 1:45 = 0.040 - 4:05 = 0.215 - 6:00 = 0.536 July 22nd reading : 10:00 a.m. = 1.554 Should do more assays with more timepoints, different concentrations. Maybe takes a certain [] to penetrate cell wall? Also, restreaked kan-casette plates Made 3 ml cultures of each section (1 colony) July 21, 2009 Restreakig of #2-4 After nearly four days of growth, I saw nothing but dead cells on the plates # 1 and # 5. So, I took what few white spots I saw on the plates # 2-4 and restreaked them.