Why do sds coated polypeptides serperate in a gel, when placed in an electrical field?

Explanation: SDS coated polypeptide separate in a gel when placed in an electric field, because SDS coated proteins are negatively charged while the electric field is politely charged. this will cause the proteins to move. the proteins that will move farthest is the smaller ones because it is easier to migrate through the gel.

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."