  We calculate impact factors for Reggeon-gluon transition in supersymmetric
Yang-Mills theory with four supercharges at large number of colours Nc. In the
next-to-leading order impact factors are not uniquely defined and must accord
with BFKL kernels and energy scales. We obtain the impact factor corresponding
to the kernel and the energy evolution parameter, which is invariant under
Moebius transformation in momentum space, and show that it is also Moebius
invariant up to terms taken into account in the BDS ansatz.
