because the proteoglycans that are present in the secretory granules of different types of rat and mouse mast cells possess small peptide cores that are rich in serine and glycine , we propose that this hl-60 cell-3 derived cdna encodes the peptide core of the proteoglycan that is expressed in the secretory granules of this human promyelocytic cell .
C0007634
cell
C0886515
secretory granules