In L-cells of the lower intestine and colon the proprotein convertase subtilisin/kexin type 1 (or PCSK1/PC1) cleaves after single or double basic amino acids to liberate glicentin (amino acids 21-89 in proglucagon), oxyntomodulin (amino acids 53-89 in proglucagon), GLP-1 (amino acids 92-128 in proglucagon), and GLP-2 (amino acids 146-178 in proglucagon) (see UniProt P01275)
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Patients should be counselled about this possibility and encouraged to report worsening fatigue
They help lower HbA1c levels, which reflect average blood glucose levels over time
At the end point, cells were collected by trypsinization (the culture medium and PBS washes were collected and re-added to each sample) and washed once with assay buffer (10 mM HEPES, 140 mM NaCl and 3.3 mM CaCl 2 , pH 7.4)