[The endocrine pancreas in Varanus niloticus: ultrastructural and cytochemical electron microscopic study and X-ray microdiffraction]. / Le pancréas endocrine de Varanus niloticus: etude ultrastructurale et cytochimique en microscopie électronique et microdiffraction aux rayons X

Electron microscopy has confirmed that there are B and A1 insular cells in the Varanidae; nevertheless, the majority of cells are A2. It is the transformation of canalicular and acinar cells that is responsible for insular regeneration. Mixed cell type can be found very frequently. X Ray microdiffraction has shown that the beta granules contain high levels of zinc; similar concentrations are found in peri-insular exocrine cells. Seasonal sexual activity intensifies the process of exo-endocrine cellular transformation and increases both the zinc level in B and pre-B cells and the sulphur level in A2 cells.