Immunogen sequence: MESMAVATDG GERPGVPAGS GLSASQRRAE LRRRKLLMNS EQRINRIMGF HRPGSGAEEE SQTKSKQQDS DKLNSLSVPS VSKRVVLGDS VSTGTTDQQG GVAEVKGTQL GDKLDSFIKP PECSSDVNLE LRQRNRGDLT ADSVQRGSRH GLEQYLSRFE EAMKLRKQLI SEKPSQEDGN TTEEFDSFRI; Positive Samples: U-87MG