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The telomerase RNA - protein complex responsible for maintenance of telomeric DNA at chromosome ends , is usually inactive in most primary somatic human cells , but is specifically activated with in vitro immortalization and during tumorigenesis .
 GENE: telomerase RNA - protein complex
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: telomerase RNA - protein complex