Recillas-Targa, Félix Position-effect protection and enhancer blocking by the chicken beta-globin insulator are separable activities. [electronic resource] - Proceedings of the National Academy of Sciences of the United States of America May 2002 - 6883-8 p. digital Publication Type: Journal Article ISSN: 0027-8424 Standard No.: 10.1073/pnas.102179399 doi Subjects--Topical Terms: AnimalsCCCTC-Binding FactorCell Line, TransformedChickensDNA-Binding Proteins--metabolismEnhancer Elements, GeneticGlobins--geneticsRepressor ProteinsTranscription Factors--metabolism