Serpin I2

Serpin I2 is the second, far less characterized member of clade I alongside neuroserpin. Human SERPINI2 expression has been reported in testis and several other tissues, and a rodent ortholog has been detected in brain. No physiological protease target has been validated; the conserved reactive-center loop suggests capacity to inhibit chymotrypsin-like proteases, possibly in the extracellular space. Given its paralog's role in neural protease control, Serpin I2 is hypothesized to fine-tune proteolysis in reproductive or nervous tissue. Recombinant Serpin I2 enables biochemical profiling, antibody generation and comparative studies of clade I serpin evolution and function.