haemoglobin

a hemoprotein composed of globin and heme that gives red blood cells their characteristic color; function primarily to transport oxygen from the lungs to the body tissues; "fish have simpler hemoglobin than mammals"

शरीर मे"haemoglobin" की कमी से कीटाणुओं से लड़ने की क्षमता नहीं रहती.

Sickle - cell anaemia is due to a recessive mutant gene - LRB - a - RRB - which produces yet another abnormal variant of haemoglobin.