The PF is superantigen and it is secreted into liquid culture by E. coli.
渗透因子是一种
抗原，存在于液体培养菌液中。
(级)抗原The PF is superantigen and it is secreted into liquid culture by E. coli.
渗透因子是一种抗原，存在于液体培养菌液中。
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