531
Another Notch ligand , Delta1 shows a right deviated pattern , but is more caudal area of the node extending to the primitive streak ( data not shown ) .
 caudal area, node, primitive streak
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 caudal area, node, primitive streak