3459
Loss of agonist binding was observed on intact human embryonic kidney 293 cells expressing the W203A receptor , conditions where high GTP levels are present ; however , high affinity binding [ ( 3 ) H ] PGE ( 2 ) was observed in broken cell preparations washed free of GTP .
 Chemical: GTP; Chemical: [ ( 3 ) H ] PGE ( 2 ); Chemical: GTP
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: GTP; Chemical: [ ( 3 ) H ] PGE ( 2 ); Chemical: GTP