  B20 compounds are a class of cubic helimagnets harboring nontrivial spin
textures such as spin helices and skyrmions. It has been well understood that
the Dzyaloshinskii-Moriya (DM) interaction is the origin of these textures, and
the physics behind the DM interaction is the spin-orbital coupling (SOC).
However the SOC shows its effect not only on the spins, but also on the
electrons. In this paper, we will discuss effects of the SOC on the electron
and spin transports in B20 compounds. An effective Hamiltonian is presented
from symmetry analysis, and the spin-orbital coupling therein shows anomalous
behaviors in anisotropic magnetoresistance (AMR) and helical resistance. New
effects such as inverse spin-galvanic effect is proposed, and the origin of the
DM interaction is discussed.
