Due to an unfortunate set of circumstances, all submitted answers to the previous Chromatography Quiz on Amino Acid Analysis have been lost. We sincerely apologize for the inconvenience to everyone who submitted an answer, and ask for all entries to be resubmitted. As we genuinely regret our technical difficulties, Rebecca will be sending prizes to all submissions, and grand prizes to everyone with the correct answer. Please resend your email, or resubmit your answer to rlsmith@pickeringlabs.com. Rebecca will send you confirmation via email that she has received your submission. All entries will be reviewed on June 11^th, and prizes will be sent at that time. You can review the quiz at: http://pickeringlabs.blogspot.com/2010/01/chromatography-quiz-no-2.html. Again, our apologies, and if you have any questions please contact Wendy or Rebecca at 650-694-6700.