... By this assay we have studied the change of the expressional level of membrane-bound CD4-markers of native and modified T-lymphocytes from human blood. ?-interferon was used for modification T-cells. ... Moscow). ... The increase of interferon concentration up to 100 IU/ml decreased the values of optical density to 0.317?0.020, but with using 10 IU/ml concentration of modificator it was no significant differences from control level. ... 2007 Biophysics dep., Biological fac., ...