10162
The thermostable endoglucanase EGPh from the hypothermophilic Pyrococcus horikoshii was transaminated with pyridoxal - 5 ' - phosphate to produce a ketone - bearing protein , which was then site - selectively modified through oxime linkage with benzylalkoxyamine or 5 kDa - poly ( ethylene glycol ) - alkoxyamine .
 pyridoxal - 5 ' - phosphate, ketone, oxime, benzylalkoxyamine, poly ( ethylene glycol ), alkoxyamine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 pyridoxal - 5 ' - phosphate, ketone, oxime, benzylalkoxyamine, poly ( ethylene glycol ), alkoxyamine