The SRC VB "Vector" and Institute of Atmospheric Optics SB RAS have been systematically studying the biogenic component of tropospheric aerosol in Southwestern Siberia. The biogenic component has two most important constituents: total protein and viable microorganisms. Analysis and generalization of experimental data accumulated over the period of observations are considered. Regression relationships between the concentration of total protein and viable microorganisms and the height above the surface and the month of observation have been obtained.