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A new approach to effective theory of quarks in the instanton vacuum ispresented. Exact equations for the quark propagator and Lagrangian are derivedwhich contain contributions of all quark modes with known coefficients. Theresulting effective Lagrangian differs from the standard one and resembles thatof the Nambu-Jona-Lasinio model.Comment: 5 page

Effective quark Lagrangian in the instanton vacuum with nonzero modes included