the pattern obtained for total hexose , fucose , hexosamines , sialic acid , fructose and sulphate demonstrated that in the domestic fowl 's oviduct the isthmus and the shell gland secrete the precursors for the protein carbohydrate substance of the mammillae and shell matrix and may contribute during the shell formation with the substrates necessary for the metabolic energy of the organ .
C0019494
hexose
C0016745
fructose