among the former cells were : ( 1 ) argentaffin ec1 cells , known to store 5ht and substance p , ( 2 ) poorly argyrophil l cells , corresponding to the glucagon-immunoreactive cells storing enteroglucagon or glucagon-like immunoreactivity ( gll ) , ( 3 ) inconstantly argyrophil f-like cells , possibly corresponding to bpp-immunoreactive cells , and ( 4 ) fairly argyrophil h cells of unknown function .
C0007634
cells
C0007613
cells