Bsph2,即Binder of Sperm Homolog 2,是Binder of Sperm(BSP)超家族的一员。BSP超家族的蛋白质主要存在于哺乳动物的附睾组织中,它们与精子的成熟和精子在女性生殖道中的功能密切相关。Bsph2蛋白在精子的膜上结合,促进精子的获能过程,这是精子成熟的关键步骤,使得精子能够成功穿透卵细胞的细胞膜并完成受精。
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