1189
A point mutation Thr ( 799 ) Met on the alpha ( 2 ) integrin leads to the formation of new human platelet alloantigen Sit ( a ) and affects collagen - induced aggregation .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
 Entities:  
Answer:
 None