Immunogen sequence: VRVSLFHTPH LRGLLRLLIP ERFNETIGLQ HIKVYLFDNS VILSGANLSD SYFTNRQDRY VFLQDCAEIA DFFTELVDAV GDVSLQLQGD DTVQVVDGMV HPYKGDRAEY CKAANKRVMD VINSA Highest antigen sequence identity to the following orthologs: Mouse - 95%, Rat - 95%. PGS1 funct