DNA clearance in chromatography of proteins, exemplified by affinity chromatography.
J Biochem Biophys Methods
; 30(1): 75-8, 1995 Feb.
Article
de En
| MEDLINE
| ID: mdl-7608472
ABSTRACT
Complications of DNA clearance in protein chromatography using the conventional methodology of spiking experiments are reported. Protein A affinity chromatography demonstrated this complications in a small scale experiment. A concentrated hybridoma culture supernatant was spiked with DNA extracted from hybridoma cells fed with [3H]thymidine. Protein A affinity chromatography was subsequently carried out. The column effluent was collected in fractions, and each fraction was analyzed for radioactivity and IgG levels. A substantial amount of DNA was eluted before the main IgG peak. Frequently a small peak is observed in front of the main peak in protein chromatography. This phenomenon can be explained by either displacement effects, or incomplete washing, or hysteresis during the adsorption and desorption conditions. Fractionation at the beginning of elution is critical to the maintenance of a high standard protein purity.
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Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Protéine A staphylococcique
/
ADN
/
Chromatographie d'affinité
Langue:
En
Journal:
J Biochem Biophys Methods
Année:
1995
Type de document:
Article
Pays d'affiliation:
Autriche