Figure 6
From: Yolk protein is expressed in the insect testis and interacts with sperm
Localization of YP2 protein in the S. littoralis male reproductive system by ICC. (A) Strong signal was detected in the cyst cells (cc) surrounding sperm bundles in the testes but not in spermatozoa (s) inside the bundles. (C) Diffused YP2 immunostaining was also detected in the columnar epithelium of the UVD wall, but not in epithelium of the seminal vesicle (E). Preabsorption of antibody with P. interpunctella ovarioles reduced staining in both cyst cells (B) and the UVD (D) with no effect on the seminal vesicle (F).