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.
(Since the coded Zimmermann Telegram was originally written in German, the text below is a translation of the German message.). We intend to begin on the first of February unrestricted submarine warfare.