The HAI-1 protein is a multifaceted inhibitor that potently inhibits HGFAC and protects against serine proteases such as ST14/matriptase and TMPRSS13. Through its BPTI/Kunitz inhibitor 1 domain, HAI-1 cleverly coordinates inhibition, engaging in a delicate molecular dance with HGFAC and TMPRSS13. HAI-1 Protein, Mouse (HEK293, Fc) is the recombinant mouse-derived HAI-1 protein, expressed by HEK293 , with C-hFc labeled tag.