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Parotid. a) No immunoreactivity for Tβ4 is detected in the parotid gland; scattered mast cells are strongly immunoreactive for the peptide; OM 250x. b) A granular and diffuse positivity for Tβ10 is observed in all the acinar structures; ductal cells show an apical and homogeneous reactivity for the peptide; OM 400x.
