2927
Eph receptors and their membrane - associated ephrin ligands regulate cell - cell interactions during development .
 GENE: Eph receptors; GENE: ephrin ligands
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: Eph receptors; GENE: ephrin ligands