12053
We demonstrated that , under serum - starved conditions , KMS - 11 and OPM - 2 cells express appreciable levels of phosphorylated FGFR3 mutants indicating a constitutive activation of the Y373C and K650E receptors ; the addition of the aFGF ligand further increased the level of receptor phosphorylation .
 GENE: FGFR3 mutants; GENE: Y373C and K650E receptors; GENE: aFGF ligand
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: FGFR3 mutants, Y373C and K650E receptors, aFGF ligand 
Answer:
 GENE: FGFR3 mutants; GENE: Y373C and K650E receptors; GENE: aFGF ligand