503
In case 2 , a homozygous 2 - bp deletion ( 2137delTG / 2138delGT / 2139delTG ) caused a frameshift , generating a premature termination codon 4 to 6 nucleotides downstream .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
Answer:
 None