Nucleic Acids Research, 1985, Vol. 13, No. 11 4047-4065
© 1985
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Multiple sequence-specific DNA binding activities are eluted from chicken nuclei at low ionic strengths
Chester Beatty Laboratories, Institute of Cancer Research Royal Cancer Hospital, Fulham Road, London SW3 6JB, UK
Received February 12, 1985. Accepted May 2, 1985.
DNA sequence-specific binding proteins eluted from chicken erythrocyte and thymus nuclei, and fractionated as described by Emerson and Felsenfeld (19), have been investigated by filter binding and footprint analyses. The erythrocyte nuclear protein fraction specifically binds to at least two sites within the 5' flanking chromatin hypersensitive site of the chicken ßA-glob1n gene, and to a site 5' to the human ß-glob1n gene. The major chicken ßA globin gene binding site ((G)gCGGGTGG) and the human ß-glob1n gene binding site ((TA)6(T)8C(T)4) occur at or near sequences which are hypersensitive to SI nyclease cleavage in supercoiled plasmids. Downstream, the second chicken ßA-globin gene binding site includes the ß-globin gene CACCC consensus sequence. Filter binding studies also show other sequence specific binding activities to human N-ras and human (but not chicken) c-myc gene sequences
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