BSZ4 Protein Z4 Serpin-Z4 A major component of the endosperm albumin, this protein acts as a storage protein during grain filling, contributing a substantial part of the grain's lysine. May have an inhibitory function during filling or germination. Inhibits cathepsin G in vitro. 399 PAZ1 HorvuZ4 Major endosperm albumin SPZ4_HORVU MATTLATDVRLSIAHQTRFALRLRSAISSNPERAAGNVAFSPLSLHVALSLITAGAAATRDQLVAILGDGGAGDAKELNALAEQVVQFVLANESSTGGPRIAFANGIFVDASLSLKPSFEELAVCQYKAKTQSVDFQHKTLEAVGQVNSWVEQVTTGLIKQILPPGSVDNTTKLILGNALYFKGAWDQKFDESNTKCDSFHLLDGSSIQTQFMSSTKKQYISSSDNLKVLKLPYAKGHDKRQFSMYILLPGAQDGLWSLAKRLSTEPEFIENHIPKQTVEVGRFQLPKFKISYQFEASSLLRALGLQLPFSEEADLSEMVDSSQGLEISHVFHKSFVEVNEEGTEAGAATVAMGVAMSMPLKVDLVDFVANHPFLFLIREDIAGVVVFVGHVTNPLISA