1903
In addition , a potent splicing enhancer sequence isolated in the selection specifically binds a 20 - kDa SR protein .
 GENE: 20 - kDa SR protein
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: 20 - kDa SR protein