1608
Activation of proenkephalin transcription by JunD is dependent upon a previously characterized cAMP -, phorbol ester -, and Ca(2+) -inducible enhancer , and JunD is shown to bind the enhancer as a homodimer .
 DNA: cAMP -, phorbol ester -, and Ca(2+) -inducible enhancer; DNA: enhancer; protein: JunD; protein: JunD; protein: homodimer
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: cAMP -, phorbol ester -, and Ca(2+) -inducible enhancer; DNA: enhancer; protein: JunD; protein: JunD; protein: homodimer