And this is known as the right hand helix. Now, we can also have a left hand helix in which the directionality is reversed. It would be counterclockwise. Now, the left handed helix is much less stable because there is more steric hindrance. There is a greater number of collisions between the Archanes of arapoli peptide. And so because of that, the energy level of the left handed helix is higher than the energy level of the right handed helix.