Sarah Thiessen is a 2007 graduate who has worked on our yeast molecular genetics project for multiple years using DNA microarray technology to locate a mutant gene. She joined the team as a Maple Scholar in the summer of 2006, helped the Molecular Cell Biology class learn about DNA microarrays in the Spring of 2007, and then returned during the summer of 2007. Her work has resulted in tentatively identifying the mutant suppressor of potassium transport deficiency we have sought for several years. The gene appears to be one that codes for a symporter of glycerol phosphate and protons which has gained the ability to transport potassium ions. This report will also be presented at the Indiana Academy of Science meeting in Indianapolis in late October and will contain information about the use of DNA microarray technology in college classes. We hope to receive your comments about any improvements following the presentation here.