6939
Conversely , activation of this signaling pathway by expression of a constitutively active MKK1 mutant dramatically increased cyclin D1 promoter activity and cyclin D1 protein expression , in a growth factor - independent manner .
 GENE: MKK1 mutant; GENE: cyclin D1; GENE: cyclin D1 protein
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: MKK1 mutant, cyclin D1, cyclin D1 protein 
Answer:
 GENE: MKK1 mutant; GENE: cyclin D1; GENE: cyclin D1 protein