Mathematically, the pI for an acidic amino acid is the average of pKa 1 and pKa R (the pKa of the dissociable proton in the R group); for a basic amino acid, it is the average of pKa 2 and pKa R.here is no dissociable proton in the R group. This type of amino acid is called a âsimple amino acidâ. A simple amino acid is electrically neutral under physiological conditions. NOTE: Under this definition it is possible to have a simple amino acid which is triprotic.
Sent through a supposedly secure channel devoted to peace negotiations (a transatlantic cable belonging to Scandinavia) on January 19th 1917, the 'Zimmermann Telegram' â often called the Zimmermann Note-was a memo sent from the German Foreign Minister Arthur Zimmermann to the German Ambassador to Mexico.
In February the British gave the American ambassador in London a copy of an intercepted German telegram. The telegram came from the German Foreign Secretary, Arthur Zimmerman, to the German ambassador to Mexico. Zimmerman proposed that in the event of war with the US, Germany and Mexico would join in an alliance. Germany would fund Mexico's conflict with the US. With victory achieved, Mexico would regain her lost territories of Arizona, Texas and New Mexico.