Biochemical study of dipeptidylpeptidase-4 from normal human serum
Other Title(s)
دراسة كيموحيوية لإنزيم الداي ببتيدايل ببتيديز-4 من مصل دم شخص طبيعي
Joint Authors
al-Amin, Safa Abd al-Aziz
Tawfiq, Fadwa Khalid
Ahmad, Tariq Yunus
Source
Issue
Vol. 27, Issue 2 (30 Apr. 2018), pp.32-41, 10 p.
Publisher
University of Mosul College of Science
Publication Date
2018-04-30
Country of Publication
Iraq
No. of Pages
10
Main Subjects
Natural & Life Sciences (Multidisciplinary)
Abstract EN
The research includes partial purification of dipeptidylpeptidase-4 (DPP-4) from serum of normal person aging 14 years in Mosul city.
Gel filtration of dialysate precipitate produced by 50% ammonium sulphate saturation has given two major proteinous components.
One of them ( peak A) possesses a high DPP-4 activity using sephedex G-100.
The apparent molecular weight of the isolated DPP-4 was 176.6 KD.
High performance liquid chromatography HPLC revealed a single peak A' at retention time 5.829 min by application the top of peak A which was isolated from gel filtration.
Maximum activity of DPP-4 was obtained using 0.1 M Tris-HCl buffer at pH 8, 40°C, 4 mM of gly-pro-p-nitroanilide hydrochloride as a substrate.
The concentration 0.35 mg/ml partially purified DPP-4 was used for next experiments.
Maximum velocity (Vmax) was 50 μM according to Line Weaver-Burk plot while Michaelis–Menten constant (Km) was 0.5 mM.
Mercuric chloride and strontium chloride hexahydrate at 5 mM revealed maximum inhibitory effect of DPP4 activity by 30.2% and 42.9% respectively
American Psychological Association (APA)
Ahmad, Tariq Yunus& al-Amin, Safa Abd al-Aziz& Tawfiq, Fadwa Khalid. 2018. Biochemical study of dipeptidylpeptidase-4 from normal human serum. Rafidain Journal of Science،Vol. 27, no. 2, pp.32-41.
https://search.emarefa.net/detail/BIM-838938
Modern Language Association (MLA)
Ahmad, Tariq Yunus…[et al.]. Biochemical study of dipeptidylpeptidase-4 from normal human serum. Rafidain Journal of Science Vol. 27, no. 2 (2018), pp.32-41.
https://search.emarefa.net/detail/BIM-838938
American Medical Association (AMA)
Ahmad, Tariq Yunus& al-Amin, Safa Abd al-Aziz& Tawfiq, Fadwa Khalid. Biochemical study of dipeptidylpeptidase-4 from normal human serum. Rafidain Journal of Science. 2018. Vol. 27, no. 2, pp.32-41.
https://search.emarefa.net/detail/BIM-838938
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 40-41
Record ID
BIM-838938