  It is shown that additional contributions both to current-induced spin
orientation and to the spin Hall effect arise in quantum wells due to gyrotropy
of the structures. Microscopically, they are related to basic properties of
gyrotropic systems, namely, linear in the wave vector terms in the matrix
element of electron scattering and in the energy spectrum. Calculation shows
that in high-mobility structures the contribution to the spin Hall current
considered here can exceed the term originated from the Mott skew scattering.
