THANKSGIVING AT ALEX'S HOUSE
'(<a href="http://www.j-archive.com/media/2002-11-27_J_30.jpg" target="_blank">Jimmy gives the last clue.</a>) The sedative effects of turkey have been attributed to this amino acid, sold as a <a href="http://www.j-archive.com/media/2002-11-27_J_30a.jpg" target="_blank">sleep aid</a> until 1990'
tryptophan