tokens: Furthermore , synergistic activation of ERK2 occurred in the absence of changes in intracellular Ca2+ , and was not blocked by inhibition of protein kinase C activity and represents a separate pathway by which CD19 regulates B cell function .
folded_tokens: furthermore , synergistic activation of erk2 occur in the absence of change in intracellular ca2+ , and be not block by inhibition of protein kinase c activity and represent a separate pathway by which cd19 regulate b cell function .