Cell types | |||||
---|---|---|---|---|---|
α-cells | β-cells | δ-cells | γ-cells | ε cells | |
Hormone secreted | Glucagon | Insulin | Somatostatin | Pancreatic polypeptide | Ghrelin |
Molecular weight (kDa) | 3.5 | 5.8 | 1.5 | 4.2 | 3.4 |
Amino acids | 29 | 51 | 14 | 36 | 28 |
Half-life (min) | 8–18 | 15 | 1–3 | 6–7 | 27–31 |
Volume % (adult) | 30–45 | 55–75 | < 10 | < 10 | < 1 |
Specific transcription factors | Nkx2.2, Arx, MafB, | Pdx1, Nkx6.1, MafA, MafB | Pax4, Pdx1, | Nkx2.2, Arx, | ? |