1943
The alternative exon introduces the novel carboxyl terminus and a new translation stop signal , while simultaneously converting the coding sequence for 40 carboxyl - terminal residues in CeCAT alpha into 3 ' - untranslated nucleotides .
 CeCAT alpha
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 CeCAT alpha