Immunogen sequence: LTCLLRGLPL PGDGEITPDL LPRPPRLLLL VNPFGGRGLA WQWCKNHVLP MISEAGLSFN LIQTERQNHA. SPHK2, along with SPHK1, catalyzes the phosphorylation of sphingosine producing the signaling molecule sphingosine-1-phosphate (S1P). S1P signals through G-