Hi, can someone explain to me if an amino acid that has an R group of NH2 or COOH can form a zwitterion? Cause with a zwitterion the charges are supposed to balance, and if it has 1 negative group and 2 positive groups/vice versa, how is it a neutral molecule? I read on a past paper that if it has e.g. an extra NH2 group, it would make the isoelectric point more basic (I think), because the amino acid is more strongly basic. But how can an isoelectric point exist if it can't form a neutral zwitterion? Any help much appreciated
yes. there is no way you can get 270 from exam alone remember the big one is 150UMS and the small one is 90UMS hence together they add up to around 240 UMS
Hi, can someone explain to me if an amino acid that has an R group of NH2 or COOH can form a zwitterion? Cause with a zwitterion the charges are supposed to balance, and if it has 1 negative group and 2 positive groups/vice versa, how is it a neutral molecule? I read on a past paper that if it has e.g. an extra NH2 group, it would make the isoelectric point more basic (I think), because the amino acid is more strongly basic. But how can an isoelectric point exist if it can't form a neutral zwitterion? Any help much appreciated
Only one of the NH2 or COOH groups gets a charge. It doesn't matter which one you give the charge to as long as there is a positive and negative charge in the overall zwitterion