B CELL STIMULATING FACTOR 1
\bˈiː sˈɛl stˈɪmjʊlˌe͡ɪtɪŋ fˈaktə wˈɒn], \bˈiː sˈɛl stˈɪmjʊlˌeɪtɪŋ fˈaktə wˈɒn], \b_ˈiː s_ˈɛ_l s_t_ˈɪ_m_j_ʊ_l_ˌeɪ_t_ɪ_ŋ f_ˈa_k_t_ə w_ˈɒ_n]\
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Soluble factor produced by activated T-lymphocytes that causes proliferation and differentiation of B-cells. Interleukin-4 induces the expression of class II major histocompatibility complex and Fc receptors on B-cells. It also acts on T-lymphocytes, mast cell lines, and several other hematopoietic lineage cells including granulocyte, megakaryocyte, and erythroid precursors, as well as macrophages.
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Word of the day
tinctura quininae ammoniata
- A preparation made by dissolving quinin sulphate in alcohol [Br. Ph.].