20002
However , the maturation - resistant NB4 - LR1 cells have a PKA isozyme switch : compared with the NB4 cells , they have decreased content of the juxtanuclearly located PKA regulatory subunit II alpha and PKA regulatory subunit II beta , and a compensatory increase of the generally cytoplasmically distributed PKA - RI alpha .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None