8376
Two disulphide bridges , which are conserved in all spermadhesin molecules and many CUB domains , crosslink loop LA and strand beta 4 and loops LE and LG , respectively , at opposite edges of the same face of the domain .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None