7689
Candidate tumor suppressor genes , Mts1 ( p16INK4a ) and Mts2 ( p15INK4b ) , have been mapped to this region , but by Southern blot analysis , no homozygous deletions were detected in either gene .
 GENE: Mts1; GENE: p16INK4a; GENE: Mts2; GENE: p15INK4b
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: Mts1, p16INK4a, Mts2, p15INK4b 
Answer:
 GENE: Mts1; GENE: p16INK4a; GENE: Mts2; GENE: p15INK4b