by immunohistochemistry , the mab 5d9 , 5b11 , 1d9 , and 4g2 were found to label approximately 50 % of the follicle-associated epithelial ( fae ) cell populations overlying lymphoid follicles in peyer 's patches , cecal patch , sacculus rotundus , and appendix .
C0007531
cecal
C0003617
appendix