Many of today's crew-cab pickups have the same legroom as a luxury sedan, and even shoppers who don't go for a crew cab will find that many extended-cab trucks have more passenger room than you'd need under usual circumstances.
n. The protein in the red blood cells of vertebrates that carries oxygen from the lungs to tissues and that consists of four polypeptide subunits, each of which is bound to an iron-containing heme molecule.[Ultimately short for. : hematin + globulin .].. The protein in the red blood cells of vertebrates that carries oxygen from the lungs to tissues and that consists of four polypeptide subunits, each of which is bound to an iron-containing heme molecule. [Ultimately short for.
*Each globin in hemoglobin contains one heme *Heme is a porphyrin molecule that contains iron *Each heme iron can bind one oxygen molecule (so each hemoglobin molecule can bind a maximum of 4 oxygen molecules *Iron gives RBC its red color.Each globin in hemoglobin contains one heme *Heme is a porphyrin molecule that contains iron *Each heme iron can bind one oxygen molecule (so each hemoglobin molecule can bind a maximum of 4 oxygen molecules *Iron gives RBC its red color.