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2-8°C | -20°C | -70°C |
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6 days | 1 month | 2 years |
Proglucagon gene is expressed in both pancreatic A cell and intestinal L cell. Tissue-specific posttranslational processing of proglucagon by prohormone convertase produces different proglucagon derived peptides (PGDPs) in both pancreas and intestine. The most notable PGDP is glucagon, whereas intestinal L cell produces several structurally related peptides, including glucagon-like peptide 1 (GLP-1) and 2 (GLP-2), as well as glicentin and oxyntomodulin, which contain glucagon sequence in their molecules. Among PGDPs, GLP-2 has been found to show intestinal epithelial proliferation.