Immunogen sequence: VQYNPTYETMF APEFGPENPF RTQQMAAPRN MLSGYAEPAH INDFMFEQQR RTFATYGYAL DPSLDNHQVS AKYIGSVEEA EKNQGLTVFE TGQKKT Highest antigen sequence identity to the following orthologs - mouse 100%, rat 73%. Pre-mRNA splicing occurs in two sequential