by Roberto — Sec­ond se­mes­ter, se­nior year at Carnegie-Mel­lon. Newly minted As­sis­tant Pro­fes­sor Bill Brown, with whom I was learn­ing to do pep­tide map­ping, runs into the lab with a huge smile hold­ing a deep blue book with a mes­mer­iz­ing struc­ture on its cover: "Look at what Stryer has done, this is so beau­ti­ful!!"