# Flory convention

As an example of its use, a peptide bond can be described by the x,y,z positions of every atom in this bond or the Flory convention can be used. Here one must know the bond lengths $l_i$, bond angles $\theta_i$, and the dihedral angles $\phi_i$ (note that the sequence of dihedral angles is specified using angle 0 as trans). Applying a vector conversion from the Cartesian coordinates to the generalized coordinates will describe the same three-dimensional structure using the Flory convention.