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The effect of PGE2 (10 μM) treatment of maturation medium on mRNA abundance of cathepsins: aCTSB, bCTSK, cCTSS, and dCTSZ in cumulus cells. The values are presented as arbitrary units and expressed as mean ± SEM of eight independent repeats (all cumulus cells separated from 10 respective oocytes in each replicate). Different letters indicate significant differences (P < 0.05), as determined by Student’s t-test
