[Recent studies concerning the effect of phytohemagglutinins (PHA) on the rosette E formation from the part of peripheral human lymphocytes].

In a previous paper it was demonstrated that the treatment of human peripheral lymphocytes with phytohaemagglutinin increases their ability to form E-rosettes, probably inducing rosette formation also by B-lymphocytes. In this paper new data are reported concerning the machanism of this phenomenon.