Western blot showing IgG, RAG1 and RAG2 expression in sarcoma cells.

<p>A, IgG protein was expressed in sarcoma cells. FBS was used as a negative control and human IgG (hIgG) was used as a positive control. B, RAG1 and RAG2 proteins were both expressed in sarcoma cells. Raji cell was used a positive control. GAPDH was used as an internal control.