Immunogen sequence: EEAMKVRKQC ALAALRDVKS YLAKEGGQIA VFDATNTTRE RRHMILHFAK ENDFKAFFIE SVCDDPTVVA SNIMEVKISS PDYKDCNSAE AMDDFMKRIS CYEASYQPLD PDKCDRDLSL IKVIDVGRRF LVNRVQD. The protein encoded by this gene belongs to a family of bifunctional proteins that