3.4.21.B39 stratum corneum tryptic enzyme cervicovaginal fluid level of KLK 5 peaks around 4 days post ovulation 691151 3.4.21.B43 kallikrein 12 cervicovaginal fluid - 679276 3.4.24.35 gelatinase B cervicovaginal fluid - 697751 5.3.99.2 Prostaglandin-D synthase cervicovaginal fluid - 749210