268867
History The first elucidation of a codon was done by Marshall Nirenberg and Heinrich J. Matthaei in 1961 at the National Institutes of Health .
 Marshall Nirenberg, Heinrich J. Matthaei
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Marshall Nirenberg, Heinrich J. Matthaei