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We investigate the virilization of the emission lines Hbeta and Mg II in thesample of 287 Type 1 Active Galactic Nuclei taken from the Sloan Digital SkySurvey database. We explore the connections between the intrinsic line shiftsand full widths at different levels of maximal intensity. We found that: (i)Hbeta seems to be a good virial estimator of black hole masses, and anintrinsic redshift of Hbeta is dominantly caused by the gravitational effect,(ii) there is an anti-correlation between the redshift and width of the wingsof the Mg II line, (iii) the broad Mg II line can be used as virial estimatoronly at 50% of the maximal intensity, while the widths and intrinsic shifts ofthe line wings can not be used for this purpose.

Virilization of the Broad Line Region in Active Galactic Nuclei - connection between shifts and widths of broad emission lines