6087
The psaD , psaF , psaH , and psaL products have two isoforms each that are distinguished by different mobilities in polyacrylamide gel electrophoresis , and the psaE product has four isoforms .
 psaD, psaF, psaH, psaL products, psaE product
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 psaD, psaF, psaH, psaL products, psaE product