2722
This difference between SP - 1 and SP - 2 peptides was not due to their differential uptake by cell , since approximately 100 times more SP - 2 peptide could be found in cytoplasmic extracts than SP - 1 peptide in experiments using radiolabeled peptides .
 GENE: SP - 1; GENE: SP - 2 peptides; GENE: SP - 2 peptide; GENE: SP - 1 peptide
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: SP - 1; GENE: SP - 2 peptides; GENE: SP - 2 peptide; GENE: SP - 1 peptide