25990
Saccharomyces cerevisiae tau 55 , a subunit of the RNA polymerase III - specific general transcription factor TFIIIC , comprises an N - terminal histidine phosphatase domain ( tau 55 - HPD ) whose catalytic activity and cellular function is poorly understood .
 Chemical: N; Chemical: histidine
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: N; Chemical: histidine