Immunogen sequence: MSRRNCWICK MCRDESKRPP SNLTLEEVLQ WAQSFENLMA TKYGPVVYAA YLKMEHSDEN IQFWMACETY KKIASRWSRI SRAKKLYKIY IQPQSPREIN IDSSTRETII RNIQEPTETC FEEAQKIVYM HMERDSYPRF LKSEMYQKLL KTMQSNNSF. RGS13 is the smallest member of the mammalian gene family,