  We constructed the Hamiltonian of spin-orbit splitting for carriers of a
tubular electron gas in InAs nanowires. The spectral problem is solved using an
exact numerical diagonalization. It is shown that the contribution of k-linear
Dresselhaus-like spin-orbit (SO) coupling leads to renormalization of so-called
SO-gaps and appearance of anticrossings in subband spectrum. These features can
be detected in ballistic transport.
