10875
HPLC phosphopeptide mapping , amino acid sequencing , and site - directed mutagenesis determined that NCLK phosphorylates Ser ( 67 ) of I - 1 .
 NCLK, I - 1
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 NCLK, I - 1