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Updated: Aug 25, 2026

Two-dimensional Gel Electrophoresis Coupled with Mass Spectrometry Methods for an Analysis of Human Pituitary Adenoma Tissue Proteome
Published on: April 2, 2018
Concanavalin A chromatography coupled to two-dimensional gel electrophoresis improves protein expression studies of
Ana María Rodríguez-Piñeiro1, Daniel Ayude, Francisco Javier Rodríguez-Berrocal
1Departamento de Bioquímica, Genética e Inmunología, Facultad de Ciencias, As Lagoas Marcosende, s/n 36200 Vigo, Spain.
Abstract:
In the present study, we show a simple method to analyse human serum proteins using Concanavalin A (Con A) chromatography coupled to two-dimensional gel electrophoresis. Serum samples were separated into two fractions, one mainly containing non-glycosylated and O-glycosylated proteins and the other enriched in N-glycosylated proteins. Both fractions were subjected to two-dimensional gel electrophoresis, and the obtained maps were analysed. The method presented here improves the resolution of the serum proteome, increasing the number of visualized spots over two times and allowing the detection of proteins with lower abundance in serum. We have proved the feasibility of the method comparing the N-glycoprotein fraction of serum from donors and colorectal cancer (CRC) patients.
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