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This bipartite motif consists of an N-terminal POU-specific domain ( POUs ), a flexible linker , and a C-terminal POU-specific homeodomain ( POUHD ).
 POU-specific homeodomain, POUs, bipartite motif, POUHD, N-terminal POU-specific domain, C-terminal POU-specific homeodomain, flexible linker
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:
 POU-specific homeodomain, POUs, bipartite motif, POUHD, N-terminal POU-specific domain, C-terminal POU-specific homeodomain, flexible linker