11071
Examination of the basal factors interacting with the 21 bp repeat elements through electrophoretic mobility shift (EMS) analyses has demonstrated the formation of DNA-protein complexes common to each of the 21 bp repeats ( C1-C3 ) as well as three DNA-protein complexes specific to the promoter proximal (pp) repeat ( U1 ( U1A/U1B ) and U2 ; 1-4).
 DNA: U2; protein: DNA-protein complexes; DNA: 21 bp repeat elements; DNA: 21 bp repeats; DNA: C1-C3; DNA: U1A/U1B; protein: DNA-protein complexes; protein: basal factors; DNA: U1; DNA: promoter proximal (pp) repeat
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: U2, DNA-protein complexes, 21 bp repeat elements, 21 bp repeats, C1-C3, U1A/U1B, DNA-protein complexes, basal factors, U1, promoter proximal (pp) repeat 
Answer:
 DNA: U2; protein: DNA-protein complexes; DNA: 21 bp repeat elements; DNA: 21 bp repeats; DNA: C1-C3; DNA: U1A/U1B; protein: DNA-protein complexes; protein: basal factors; DNA: U1; DNA: promoter proximal (pp) repeat