Immunogen sequence: NCTLNWPIEA FPAPEEVNYT KKIKLSGLAL DHKVTGDLFY THVTTMGQRL SQKAPSLEDG SDAFMSPQDV RGTSENLPER SVPLRKSLCS Highest antigen sequence identity to the following orthologs: Mouse - 79%, Rat - 78%. SLC43A1 belongs to the system L family of plasma