http://www.flashcardexchange.com/tag/llusp www.flashcardexchange.com: llusp Flashcards en-us Wed, 15 Feb 2012 06:09:35 PST Wed, 15 Feb 2012 06:09:35 PST support@flashcardexchange.com 720 http://www.flashcardexchange.com/flashcards/view/1174207 These cards will help you learn the amino acid structures, one letter abbreviations, and R-group chemical properties. 2010-03-04 http://www.flashcardexchange.com/flashcards/view/1174207 http://www.flashcardexchange.com/flashcards/view/504839 These cards will help you learn the amino acid structures, one letter abbreviations, and R-group chemical properties. 2007-09-21 http://www.flashcardexchange.com/flashcards/view/504839