25 April 1975
Vol 188, Issue 4186

About The Cover

Galaxy-like microscopic immunoprecipiate surrounding an erythrocyte (F cell) contained fetal hemoglobin (HbF) precipitate formed when, upon cell lysis, HbF diffused into an agarose gel and reacted with antiserums to HbF. Ghost of erythrocyte free of HbF is seen at left center (about X 1360). See page 361. [S. H. Boyer, Johns Hopkins University, Galtimore, Maryland]