Now remember from organic chemistry that single bonds can actually rotate, but double bonds cannot rotate. And because we have a double bond character between the carbon and the nitrogen, this peptide bond also will not be able to rotate in space. So this bond, this bond, this bond and this bond, the atoms that are connected by these bonds will not be able to rotate in space. And not only that, but because we have the double bond character, there will be six atoms arranged along the following diagram as we'll see in just a moment that will lie along the same plane. So the double bond nature of the peptide bond makes the peptide bond planar and prevents any rotation about the peptide bond. So basically this atom number one, this atom number two, this atom number three, this atom number four, this atom number five and this atom number six will all lie along the same plane.