11903
CamVMPII encodes an open reading frame of 488 amino acids , which includes a signal peptide , a pro - domain , a metalloproteinase domain , a spacer , and an RGD - disintegrin domain .
 amino acids
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 amino acids