875
Reexamination of the cdc4 - 1 mutant revealed that , in addition to being defective in the onset of S phase , it is also defective in G ( 2 ) / M transition when released from hydroxyurea - induced S - phase arrest .
 GENE: cdc4 - 1 mutant
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: cdc4 - 1 mutant