11880
We have developed a novel assay to monitor the active, GTP-bound form of Rap1 based on the differential affinity of Rap1GTP and Rap1GDP for the Rap binding domain of RalGDS ( RBD ).
 protein: Rap1GTP; protein: RalGDS; protein: GTP-bound form; protein: RBD; protein: Rap1; protein: Rap1GDP; protein: Rap binding domain
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: Rap1GTP, RalGDS, GTP-bound form, RBD, Rap1, Rap1GDP, Rap binding domain 
Answer:
 protein: Rap1GTP; protein: RalGDS; protein: GTP-bound form; protein: RBD; protein: Rap1; protein: Rap1GDP; protein: Rap binding domain