9264
Partial characterization of the active site human platelet cAMP phosphodiesterase , PDE3A , by site - directed mutagenesis .
 human platelet cAMP phosphodiesterase, PDE3A
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 human platelet cAMP phosphodiesterase, PDE3A