Parathyroid secretory protein |
paravascular cells |
Tolerosomes |
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also: Parathyroid secretory protein. Abbr. PSP, PSP1. Parathyroid secretory protein, described first by Kemper et al (1974), is a protein co-stored and coreleased with parathyroid hormone from storage granules in the parathyroid gland (Ravazzola et al, 1978). The protein is being referred to also as Secretory protein-1 (abbr. SG-I).
Its secretion is inversely proportional to extracellular calcium concentration. The protein can be phosphorylated (Bhargava et al, 1983). Bhargava et al (1983) have reported also that the degree of phosphorylation is inversely proportional to serum calcium.
Cohn et al (1984) have reported that the protein is detected also in calcitonin cells
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