Two new sheep haemoglobins, one of which is replaced by haemoglobin C in anaemia.

Two new haemoglobin variants, provisionally named Hb G and Hb H, were found during a survey of 295 Welsh Mountain cross-bred sheep. Both haemoglobins appear to be beta chain variants controlled by genes allelic to those for the common forms Hb A and Hb B. Studies on an anaemic Hb AH and an Hb AG type sheep showed that Hb G, like Hb A, is replaced by Hb C in anaemia whereas Hb H, like Hb B, is not replaced.