The contribution of the G2​ structure function to polarized deep inelastic
scattering is slightly redefined in order to avoid kinematical zeros. Its
strong Q2-dependence implied by the Burkhardt-Cottingham (BC) sum rule
naturally explains the sign change of the generalized Gerasimov-Drell-Hearn
(GDH) sum rule. The status of the BC sum rule and implications for other spin
processes are discussed.Comment: 16 pages,CPT-94/P.3014,late