Voice actress Jen Taylor, who plays Cortana both in Halo and on Windows Phone, says the way sheâs voiced the character over the years has changed. Cortanaâs features take shape in these concept drawings. âTo me, Cortanaâs been the greatest guide. She is a smart, independent woman â other than she needs you to move around.
Essential amino acids. There are nine amino acids that your body canât make. They are called essential amino acids, meaning you must have them to live. They are found in foods like milk, eggs and meat and also a wide variety of plants. This is part of why you canât survive on a diet of just corn chips for very long. Essential amino acids were actually discovered in an experiment testing something very similar to a corn chip diet. Scientists fed rats a diet that had only corn protein in it and observed the results.
What Is an Essential Amino Acid? An essential amino acid may also be called an indispensable amino acid. This is an amino acid that the body cannot synthesize on its own, so it must be obtained from the diet. Because each has its own physiology, the list of essential amino acids is different for humans than it is for other organisms.