12811
In addition, Ras(G12V) complemented signaling by an erythropoietin receptor mutant defective in Ras activation and augmented the activation of the beta-casein promoter by the mutant erythropoietin receptor signaling , suggesting a possible role of Ras in Stat5 -mediated gene expression .
 protein: Ras(G12V); protein: erythropoietin receptor mutant; protein: Ras; protein: Stat5; protein: beta-casein; protein: mutant erythropoietin receptor; DNA: beta-casein promoter; protein: Ras
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: Ras(G12V), erythropoietin receptor mutant, Ras, Stat5, beta-casein, mutant erythropoietin receptor, beta-casein promoter, Ras 
Answer:
 protein: Ras(G12V); protein: erythropoietin receptor mutant; protein: Ras; protein: Stat5; protein: beta-casein; protein: mutant erythropoietin receptor; DNA: beta-casein promoter; protein: Ras