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An explicit evaluation of the spin asymmetry of the deuteron and theassociated GDH sum rule is presented which includes disintegration, single anddouble pion and eta production. For the GDH integral a large cancellation isfound between the disintegration channel and the meson production channels.Furthermore, first results for the contribution of the disintegration channelto the generalized GDH integral at constant four-momentum transfer reveal adominance of the isovector M1 transition to the $^1$S$_0$-state near thresholdresulting in a negative contribution with a minimum around $Q^2\approx 0.2$fm$^{-2}$ which is driven by the nucleon anomalous isovector magnetic moment.Comment: 9 pages, 7 figures, World Scientific style, invited talk at GDH 2004  Symposiu

SPIN ASYMMETRY AND GDH SUM RULE FOR REAL AND VIRTUAL PHOTONS FOR THE DEUTERON