There has been a new look at the old Miller-Urey 1953-58 experiments with a supposed ancient atmosphere and amino acids. More amino acids have been found but I don't see a claim for more than the eight essential amino acids found in arriving metoerites so far in that kind of research. Remember we humans need 20 essential amino acids in our proteins. Now that it appears that life started only two byo this research becomes of even more interest.-http://www.the-scientist.com/news/display/58083/