We evaluate the effect of stretching on the optical conductance of
a single layer graphene sheet. It is found that the low energy
(Dirac regime) isotropy that leads to the `universal conductance'
is lost. More significantly, due to the loss of C_3 symmetry, a
non-zero Hall conductance emerges for stretching along chiral
directions, reaching a maximum at a stretching angle of 45
degrees, and being as high a S_0 = e2/4h at van Hove
singular point for bond angle changes of about 2 degrees.