Patent 7943137 was granted and assigned to Takeda Pharmaceutical Company on May, 2011 by the United States Patent and Trademark Office.
By using FPRL1 ligand, which comprises the same or substantially the same amino acid sequence as the amino acid sequence represented by SEQ ID NO: 1, SEQ ID NO: 17 or SEQ ID NO: 21, and FPRL1, an efficient screening for FPRL1 agonist or FPRL1 antagonist can be performed.