7884
Organization of the human LU gene and molecular basis of the Lu ( a ) / Lu ( b ) blood group polymorphism .
 human LU gene, Lu ( a ), Lu ( b )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 human LU gene, Lu ( a ), Lu ( b )