Sequential double fluorescent detections of total proteins and phosphoproteins in SDS‐PAGE. Issue 8 (20th March 2014)

• Record Type: Journal Article
• Authors: Hwang, Sun‐Young; Wang, Xu; Cong, Wei‐Tao; Jin, Li‐Tai; Choi, Jung‐Kap
• Is Part Of: Electrophoresis. Volume 35:Issue 8(2014:Apr.)
• Page Start: 1089
• Page End: 1098
• Publication Date: 2014-03-20
• Subjects: Electrophoresis -- Periodicals; Electrophoresis -- Periodicals; 541.372
• DOI: 10.1002/elps.201300538
• Languages: English
• ISSNs: 0173-0835

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>A fluorescent staining technique, using selective chelation with fluorophore and metal ion to the phosphate groups of phosphoproteins in SDS‐PAGE is described. As a fluorescent dye and a metal ion, Fura 2 pentapotassium salt and Al³⁺ were employed, respectively. The staining method, Fura 2 stain, has sensitivities of 16–32 ng of α‐casein and β‐casein, 62 ng of ovalbumin, phosvitin, and κ‐casein using an ultraviolet transilluminator. Furthermore, Fura 2 stain is able to carry out continuative double detection of total proteins and phosphoproteins on the same gel within 3.5 h. Consequently, selective phosphoprotein and total protein detections could be obtained without other poststaining. Considering the low cost, simplicity, and speed, Fura 2 staining may provide great practicalities in routine phosphoproteomics research.</p> </abstract>