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We have determined that the developmental control of immunoglobulin kappa 3' enhancer ( kappa E3' ) activity is the result of the combined influence of positive- and negative-acting elements .
 DNA: immunoglobulin kappa 3' enhancer; DNA: kappa E3'; DNA: positive- and negative-acting elements
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 DNA: immunoglobulin kappa 3' enhancer; DNA: kappa E3'; DNA: positive- and negative-acting elements