Abstract
Chicken erythrocyte nuclei were incubated with DNA intercalating agents in order to isolate from chromatin specific DNA-binding proteins whose binding specificity may be determined by DNA secondary and/or tertiary structure. The intercalating agents ethidium bromide (EtBr) and propidium iodide induce the specific release of high mobility group proteins HMG 14 and HMG 17 under low ionic strength conditions. Chloroquine (CQ) intercalation also results in the selective liberation of HMG 14 and HMG 17, but, in addition, selectively releases other nuclear proteins (including histone H1A) in a pH- and ionic strength-dependent fashion. The use of this new 'elutive intercalation' technique for the isolation and purification of 'sequence-specific' and 'helix-specific' DNA-binding proteins is suggested.
MeSH Terms
Animals
Chickens
Chromatin/drug effects,metabolism
DNA-Binding Proteins/blood,isolation & purification
Erythrocytes/metabolism
Ethidium/pharmacology
High Mobility Group Proteins/blood,isolation & purification
Intercalating Agents
Molecular Weight
Phenanthridines/pharmacology
Propidium/pharmacology
Chemicals
Chromatin
DNA-Binding Proteins
High Mobility Group Proteins
Intercalating Agents
Phenanthridines
Propidium
Ethidium
Authors & Affiliations
4 authors, click to expand affiliations / ORCID
Schröter H
Maier G
Ponstingl H
Nordheim A
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