1948
We have generated a polyclonal antibody against a peptide from a unique region within retinoschisin , which detects a protein of approximately 28 kDa in retinal samples reduced with dithiothreitol , but multimers sized > 40 kDa under non - reducing conditions .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 None