18414
Also , cells containing a triple - cysteine mutant of maspin showed elevated ERK1 / 2 activity , a downstream target of ROS , and enhanced proliferation and colony formation .
 Chemical: cysteine
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: cysteine