SLPI GI:4507065 secretory leukocyte peptidase inhibitor precursor 1 mkssglfpfl vllalgtlap wavegsgksf kagvcppkks aqclrykkpe 50 51 cqsdwqcpgk krccpdtcgi kcldpvdtpn ptrrkpgkcp vtygqclmln 100 101 ppnfcemdgq ckrdlkccmg mcgkscvspv ka