Learn the names, structural formulas, 1-letter codes, and 3-letter codes for each of the 20 standard amino acids. Test and improve your knowledge of the 20 standard amino acids using this app's customizable quizzes. Multiple choice quizzes cover the following 6 topics: - Amino acid names - Structural formulas - 1-Letter codes - 3-Letter codes - Codons - Side chain classes All topics can be studied for free using this app. An in-app purchase is available to remove the banner ad. The game language can easily be changed in-app to English, French, Spanish, German, Simplified Chinese, Traditional Chinese, Japanese, Korean, Italian, Indonesian, Russian, Portuguese, Swedish, Norwegian, and Dutch.