1517
Initial screening of a rat liver cDNA library with an oligonucleotide probe derived from the rat SCP2 protein sequence revealed an 825 - base pair cDNA clone coding for the complete SCP2 protein sequence .
 SCP2, SCP2
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 SCP2, SCP2