3:00 PM 33. CHARACTERIZATION OF PROTEIN PHOSPHATASE 2A ACTIVITY CHANGES DURING EPIDIDYMAL SPERM MATURATION. Ferrara, John ¹, Huang, Zaohua¹, Vijayaraghavan, Srinivasan¹, ¹ Kent State University, Kent, OH

3:15 PM 34. SPERMATOZOA MECHANICALLY STIMULATES PROSTAGLANDIN PRODUCTION BY THE BOVINE OVIDUCTAL EPITHELIAL CELLS. Wijayagunawardane, Missaka P¹, Kodithuwakku, Suranga¹, Miyamoto, Akio², ¹ University of Peradeniya, Peradeniya, Sri Lanka² Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Japan

3:30 PM 35. COMPLEXIN 1 KNOCKOUT MOUSE SPERM ARE SUB-INFERTILE DUE TO A DEFECT IN ACROSOMAL EXOCYTOSIS. Zhao, Longmei¹, Burkin, Heather¹, Reim, Kerstin², Brose, Nils², Miller, David¹, ¹ University of Illinois at Urbana-Champaign, Urbana, IL² Max-Plank-Institute for Experimental Medicine, Göttingen, Germany

3:45 PM 36. T COMPLEX PROTEIN TCTEX5 IS A CANDIDATE FOR THE PROTEIN PHOSPHATASE 1 GAMMA 2 INHIBITOR IN SPERMATOZOA. Cheng, Lina¹, Myers, Kimberley¹, Han, Yibing^{2, 3}, Pilder, Stephen², Vijayaraghavan, Srinivasan¹, ¹ Kent State University, Kent, OH² Temple University School of Medicine, Philadelphia, PA³ Chinese University of Hong Kong, Shatin, New Territories, Hong Kong

4:00 PM 37. ZPB/ZPC IS THE UBIQUITINATED SPERM RECEPTOR ON PORCINE ZONA PELLUCIDA. Sutovsky, Peter¹, Manandhar, Gaurishankar¹, Miller, David ², Sutovsky, Miriam ¹, ¹ University of Missouri-Columbia, Columbia, MO² University of Illinois at Urbana-Champaign, Urbana, IL

4:15 PM 38. RECIPROCAL AMOUNTS OF PLC AND TYPE-1 INOSITOL 1,4,5 TRISPHOSPHATE RECEPTOR CONFER SPECIES-SPECIFIC CALCIUM RESPONSES IN MAMMALIAN EGG ACTIVATION. Malcuit, Christopher ¹, Kurokawa, Manabu ¹, Sato, Ken-ichi ², Lee, Bora¹, He, Changli¹, Parys, Jan³, Fissore, Rafael¹, ¹ University of Masschusetts, Amherst, MA² Kobe University, Kobe, Japan³ Katholieke University Leuven, Leuven, Belgium

4:30 PM 39. SUPPRESSION OF SPERM-INDUCED Ca²⁺ SIGNALING IN FERTILIZED MOUSE EGGS AFFECTS MEMBRANE AND CORTICAL DYNAMICS AND THE MEMBRANE BLOCK TO POLYSPERMY. Gardner, Allison¹, Larson, Stephanie¹, Wortzman, Genevieve¹, Evans, Janice¹, ¹ Johns Hopkins University, Baltimore, MD

4:45 PM 40. CAPACITATION DEPENDENT CHANGES IN THE LOCALIZATION AND COMPOSITION OF ZONADHESIN IN MOUSE SPERMATOZOA. Tardif, Steve¹, Hardy, Daniel¹, ¹ Texas Tech University Health Sciences Center, Lubbock, TX