By looking at the electrophoresisram, and providing the answers in the box below, indicate: i) which of the known (!) amino acids are potentially at/ near their isoelectric point. Justify your answer by describing their relative migration compared to the origin and deduce their overall charge. (0.5 marks) ii) Using one of these amino acids, describe how it meets the definition of being isoelectric by describing the protonation/ deprotonation state of all of the ionisable groups, and hence its overall charge. (1 mark)