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RXRs heterodimerize with 1, 25-dihydroxyvitamin D3 [ 1,25(OH)2D3 ] receptor ( VDR ), enabling their efficient transcriptional activation .
 1, 25-dihydroxyvitamin D3 [ 1,25(OH)2D3 ] receptor, RXRs, VDR
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 1, 25-dihydroxyvitamin D3 [ 1,25(OH)2D3 ] receptor, RXRs, VDR