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Regenerating Protein 1 alpha Human E. coli

  • Regulatory status:RUO
  • Type:Recombinant protein
  • Source:E. coli
  • Other names:REG-1-alpha, PSP, Pancreatic stone protein, Lithostatine, Litostathine-1-alpha, Pancreatic thread protein, PTP, Islet od langerhans regenerating protein, Regenerating islet-derived protein 1-alpha, Islet cell regeneration factor, IC , PeroxiredoxinVI (Prx VI), PDGFR (PDGFR)
  • Species:Human
Cat. No. Size Price
1 - 4 pcs / 5 - 9 pcs / 10+ pcs

RD172078100 0.1 mg $421 / $370 / On request
PubMed Product Details
Technical Data


Recombinant protein


Total 156 AA. MW: 17.8 kDa (calculated). UniProtKB acc.no. P05451. N-Terminal His-tag 12 AA.

Amino Acid Sequence



E. coli


˃ 90 % by SDS-PAGE


12% SDS-PAGE separation of Human REG1 alpha
1. M.W. marker – 14, 21, 31, 45, 66, 97 kDa
2. reduced and heated sample, 2.5μg/lane
3. non-reduced and non-heated sample, 2.5μg/lane


< 1.0 EU/µg


Filtered (0.4 μm) and lyophilized in 0.5 mg/mL in 20mM TRIS, 50mM NaCl, pH 7.5


Add deionized water to prepare a working stock solution of approximately 0.5 mg/mL and let the lyophilized pellet dissolve completely.


Western blotting, ELISA


At ambient temperature. Upon receipt, store the product at the temperature recommended below.


Store the lyophilized protein at -80 °C. Lyophilized protein remains stable until the expiry date when stored at -80 °C. Aliquot reconstituted protein to avoid repeated freezing/thawing cycles and store at -80 °C for long term storage. Reconstituted protein can be stored at 4 °C for a week.

Quality Control Test

BCA to determine quantity of the protein.
SDS PAGE to determine purity of the protein. Endotoxin level determination.


This product is intended for research use only.


Research topic

Diabetology - Other Relevant Products, Immune Response, Infection and Inflammation, Oncology, Pancreatic regulatory molecules, Animal studies


Reg protein was shown to be stimulated during the regeneration of pancreatic islets. Since then, many Reg-related proteins have been identified in humans and other animals. In human, the four REG family genes, i.e., REG 1 alpha, REG 1 beta, REG-related sequence (RS) and HIP/PAP, have so far been isolated. These Reg-related proteins are classified into four subfamilies according to their amino-acid sequences, but they share a similar structure and physiological function. Reg protein is a growth factor for pancreatic beta cells and also suggest that the administration of Reg protein could be used as another therapeutic approach for diabetes mellitus. human REG cDNA which encoded a 166-amino acid protein with a 22-amino acid signal peptide. The amino acid sequence of human REG protein has 68% homology to that of rat Reg protein. Reg I was found to be expressed mainly in pancreatic beta and acinoductular cells as well as gastric fundic enterochromaffin-like (ECL) cells. Reg I production in ECL cells is stimulated by gastrin, as well as by the proinflammatory cytokine, cytokine-induced neutrophil chemoattractant (CINC)-2Beta. In patients with chronic hypergastrinemia, Reg production is stimulated, with the increased proliferation of gastric mucosal cells. Patients with Helicobacter pylori infection also showed increased Reg production in the gastric mucosa, partly via increased plasma gastrin concentration and partly via increased proinflammatory cytokine production. The serum concentration of the reg-protein was significantly higher in patients with various pancreatic diseases than in normal controls, and was also significantly higher in patients with acute pancreatitis or chronic relapsing pancreatitis than in patients with chronic pancreatitis. Furthermore, the serum PSP/reg-protein concentration was also significantly increased in liver cirrhosis, choledocholit­hiasis, and various cancers of the digestive system.

Summary References (18)

References to Regenerating Protein 1 alpha

  • Ashcroft FJ, Varro A, Dimaline R, Dockray GJ. Control of expression of the lectin-like protein Reg-1 by gastrin: role of the Rho family GTPase RhoA and a C-rich promoter element. Biochem J. 2004 Jul 15;381 (Pt 2):397-403
  • Bartoli C, Baeza N, Figarella C, Pellegrini I, Figarella-Branger D. Expression of peptide-23/pancreatitis-associated protein and Reg genes in human pituitary and adenomas: comparison with other fetal and adult human tissues. J Clin Endocrinol Metab. 1998 Nov;83 (11):4041-6
  • Bartoli C, Gharib B, Giorgi D, Sansonetti A, Dagorn JC, Berge-Lefranc JL. A gene homologous to the reg gene is expressed in the human pancreas. FEBS Lett. 1993 Aug 2;327 (3):289-93
  • Boonyasrisawat W, Pulsawat P, Yenchitsomanus PT, Vannasaeng S, Pramukkul P,Deerochanawong C, Sriussadaporn S, Ploybutr S, Pasurakul T, Banchuin N. Analysis of the reg1alpha and reg1beta gene transcripts in patients with fibrocalculous pancreatopathy. Southeast Asian J Trop Med Public Health. 2002 Jun;33(2):365-72.
  • Carrere J, Guy-Crotte O, Gaia E, Figarella C. Immunoreactive pancreatic Reg protein in sera from cystic fibrosis patients with and without pancreatic insufficiency. Gut. 1999 Apr;44 (4):545-51
  • de la Monte SM, Ozturk M, Wands JR. Enhanced expression of an exocrine pancreatic protein in Alzheimer's disease and the developing human brain. J Clin Invest. 1990 Sep;86 (3):1004-13
  • De Reggi M, Gharib B. Protein-X, Pancreatic Stone-, Pancreatic thread-, reg-protein, P19, lithostathine, and now what? Characterization, structural analysis and putative function(s) of the major non-enzymatic protein of pancreatic secretions. Curr Protein Pept Sci. 2001 Mar;2 (1):19-42
  • Iovanna JL, Dagorn JC. The multifunctional family of secreted proteins containing a C-type lectin-like domain linked to a short N-terminal peptide. Biochim Biophys Acta. 2005 May 25;1723 (1-3):8-18
  • Kawamata H, Furihata T, Omotehara F, Sakai T, Horiuchi H, Shinagawa Y, Imura J, Ohkura Y, Tachibana M, Kubota K, Terano A, Fujimori T. Identification of genes differentially expressed in a newly isolated human metastasizing esophageal cancer cell line, T.Tn-AT1, by cDNA microarray. Cancer Sci. 2003 Aug;94 (8):699-706
  • Kiji T, Dohi Y, Takasawa S, Okamoto H, Nonomura A, Taniguchi S. Activation of regenerating gene Reg in rat and human hearts in response to acute stress. Am J Physiol Heart Circ Physio. 2005 Jul;289 (1):H277-84
  • Kinoshita Y, Ishihara S, Kadowaki Y, Fukui H, Chiba T. Reg protein is a unique growth factor of gastric mucosal cells. J Gastroenterol. 2004 Jun;39(6):507-13.
  • Norkina O, Graf R, Appenzeller P, De Lisle RC. Caerulein-induced acute pancreatitis in mice that constitutively overexpress Reg/PAP genes. BMC Gastroenterol. 2006;6:16
  • Okamoto H. The Reg gene family and Reg proteins: with special attention to the regeneration of pancreatic beta-cells. J Hepatobiliary Pancreat Surg. 1999;6(3):254-62.
  • Qiu L, List EO, Kopchick JJ. Differentially expressed proteins in the pancreas of diet-induced diabetic mice. Mol Cell Proteomics. 2005 Sep;4 (9):1311-8
  • Shinozaki S, Nakamura T, Iimura M, Kato Y, Iizuka B, Kobayashi M, Hayashi N. Upregulation of Reg 1alpha and GW112 in the epithelium of inflamed colonic mucosa. Gut. 2001 May;48 (5):623-9
  • Sobajima H, Niwa T, Shikano M, Naruse S, Kitagawa M, Nakae Y, Ishiguro H, Kondo T, Hayakawa T. Urinary excretion of pancreatic stone protein in diabetic nephropathy. Intern Med. 1998 Jun;37 (6):500-3
  • Unno M, Nata K, Noguchi N, Narushima Y, Akiyama T, Ikeda T, Nakagawa K, Takasawa S, Okamoto H. Production and characterization of Reg knockout mice: reduced proliferation of pancreatic beta-cells in Reg knockout mice. Diabetes. 2002 Dec;51 Suppl 3:S478-83
  • Yuan RH, Jeng YM, Chen HL, Hsieh FJ, Yang CY, Lee PH, Hsu HC. Opposite roles of human pancreatitis-associated protein and REG1A expression in hepatocellular carcinoma: association of pancreatitis-associated protein expression with low-stage hepatocellular carcinoma, beta-ca
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