Protease inhibitor required for egg fertilization. Required to prevent premature zona pellucida hardening before fertilization, probably by inhibiting the protease activity of ASTL, a protease that mediates the cleavage of ZP2 and triggers zona pellucida hardening (By similarity).

Associated with:

Matrix Type

  • Plasma
  • Tissue/Cells

Gene Symbol

  • FETUB

UniProt ID

  • Q9UGM5

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