would any one tell me about the measurement of B-catenin in lymphocyte culture cell ?

Emma,

B-catenin ca be measured by Western blot with specific antibodies, such as those available from Cell Signalling and many other sources. They come in phopho (activated) and regular.

Rb

In addition, you can check the downstream events of Ecadherin- b Catenin signaling to verify the presence and function of this protein