Keywords: Nierenberg matthaei.jpg Heinrich Matthaei was Marshall Nirenberg's first postdoctoral researcher Their collaboration led to the now famous protein synthesis poly-U experiments and the first clue to the genetic code http //profiles nlm nih gov/JJ/B/B/D/G/ 1961 N MacVicar National Institutes of Health PD-USGov 1961 Heinrich Matthaei Marshall Warren Nirenberg |