12533
The gene encoding the retinoic acid-synthesizing enzyme aldehyde dehydrogenase 1 ( Aldh1 ), initially called Hdg-1 , was found to be ectopically activated by HOX11 in this system.
 protein: Aldh1; protein: retinoic acid-synthesizing enzyme; protein: aldehyde dehydrogenase 1; protein: Hdg-1; protein: HOX11
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: Aldh1, retinoic acid-synthesizing enzyme, aldehyde dehydrogenase 1, Hdg-1, HOX11 
Answer:
 protein: Aldh1; protein: retinoic acid-synthesizing enzyme; protein: aldehyde dehydrogenase 1; protein: Hdg-1; protein: HOX11