Basophil Leukocytes and Tissue Mast Cells in Newt, Diemyctylus viridescens

Abstract
Cytological and cytochemi-cal investigations of basophil leucocytes and tissue mast cells in the newt, Diemyctylus viridescens, have indicated that these two types are morphologically distinct. Basophils contain larger granules and less cytoplasm than mast cells. Cytochemical methods for proteins and mucopolysaccha-rides failed to disclose any significant difference between the two types of cells, but indicated that the cytoplasmic mucoproteins differed from those of homologus mammalian cells. The protein/mucopolysaccharide ratio was lower, and they appeared to be less sulfated.

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