  It is shown that it is possible to introduce a mixing in the solar model not
in a contradiction with the present data of helioseismology. Particularly it is
demonstrated that resulted violation in the sound speed profile is within the
uncertainties of helioseismic data. The effect of such mixing in a spherical
shell in the central zone of the Sun would be the substantial increase of the
neutrino flux from 13N while all other neutrino fluxes will stay practically
unchanged. The implications for future experiments are discussed.
