I know this is probably very basic, but I find that I am slow at it. Does anyone have a quick way to determine what will happen to an amino acid (when they give you the pI) if it is placed in an acidic/basic solution? Like something I can memorize... If pI is more than x then in basic it is protonated/deprotonated and in acidic it is protonated/deprotonated, etc... Help! Thanks in advance.