Either the A(C15S) chain and B(C55S) chain alone or in combination can not exhibit the phospholipase A2 activity or synaptosome binding activity of b-Bgt.

• 纯化的A（C15S）链与B（C55S）单独或混和测试时均无明显Phospholipase A2 的酵素活性，同时也无法与Synaptosome 结合。