Leaching of concanavalin A during affinity chromatographic isolation of cell surface glycoproteins from human fetal neurons and glial cells
1992
Abstract Preparation of surface glycoproteins from human fetal brain cells by affinity chromatography on Con A-Sepharose 4B was a problematic endeavor due to leaching of Con A from the matrix. Dissociation of Con A from the matrix took place irrespective of the presence of lipid and/or detergent and the buffer composition during chromatography and was apparently related to the nature of the protein under study. Pretreatment of Con A-Sepharose with 6 m guanidine or 8 m urea reduced Con A leaching. The Con A eluate also contained noncovalently associated glycolipid. Elution at 25°C rendered fractions containing a higher degree of Con A and glycolipid contamination compared to the negligible contamination by these two components when elution was carried out at 4°C. This phenomenon was attributed to the formation of heterogeneous mixed micelles of glycoprotein.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
17
References
13
Citations
NaN
KQI