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IL-7 and IL-15 induced the same complexes as IL-2 , a feature explained by the existence of similar tyrosine -phosphorylated motifs in the cytoplasmic domains of IL-2R beta and IL-7R that can serve as docking sites for Stat proteins .
 protein: Stat proteins; protein: cytoplasmic domains; protein: IL-2; protein: IL-15; protein: IL-2R beta; protein: tyrosine -phosphorylated motifs; protein: IL-7R; protein: IL-7
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: Stat proteins, cytoplasmic domains, IL-2, IL-15, IL-2R beta, tyrosine -phosphorylated motifs, IL-7R, IL-7 
Answer:
 protein: Stat proteins; protein: cytoplasmic domains; protein: IL-2; protein: IL-15; protein: IL-2R beta; protein: tyrosine -phosphorylated motifs; protein: IL-7R; protein: IL-7