Metadata entity category	Property name in data file	Standard property name in metadata file
Protein	Ligand1An	PR_Center_Batch_ID
Unclassified Perturbagen	Ligand1An	UP_Center_Batch_ID
Protein	ECM1An	PR_Center_Batch_ID
Protein	ECM2An	PR_Center_Batch_ID
Cell Line	CellLineAn	CL_Center_Batch_ID
