  We study the so-called Descent, or Q-bar, Equation for the null polygonal
supersymmetric Wilson loop in the framework of the pentagon operator product
expansion. To properly address this problem, one requires to restore the
cyclicity of the loop broken by the choice of OPE channels. In the course of
the study, we unravel a phenomenon of twist enhancement when passing to a
cyclically shifted channel. Currently, we focus on the consistency of the
all-order Descent equation for the particular case relating the NMHV heptagon
to MHV hexagon. We find that the equation establishes a relation between
contributions of different twists and successfully verify it in perturbation
theory making use of available bootstrap predictions for elementary pentagons.
