2 DISTINCT SPECIES OF CORN CYSTATIN IN CORN KERNELS

Besides corn cystatin I (CC-I) we found, by cloning, another molecular species of cystatin, named corn cystatin II (CC-II), which was found by screening with CC-I cDNA as a probe, The dissimilarity in amino aci d sequence between CC-I and CC-II was distinct around the N-terminal r egion, Enzymologically, CC-II protein expressed in Escherichia coli wa s a stronger inhibitor of cathepsin L than CC-I.