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    • #239

      Hemoglobin has four different chains of amino acids, called the globin chains. Each type of chain is coded for by a specific gene, so…

      Are the genes which code for globin chains present in every cell of the human body?
      Which type of cell must produce the globin chains in order to form homoglobin and carry oxygen?
      Why must the genes responsible for hemolgobin formation be turned off in all the other types of body cells?

      Thank you or helping, i’m really struggling with all this!

    • #18734

      Aah! There’s that favorite protein of mine again =D

      As with [b]all[/bl genes, yes, the hemoglobin gene is present in every nucleus of the human body. However, there are genes that control other genes. This results in the hemoglobin gene only being active in the red blood cells, and being synthesized there.

      As for your last question, it mostly has to relate to energy. Any organism is a stickler for being as efficient as possible. Energy unproductively used in the body is a waste of energy, and can reduce the chances of survival. Hemoglobin is used only in the red blood cells, and therefore have no need to be used in say…a skin cell. Were skin cells produce hemoglobin, a waste of both the energy required to make the protein, as well as a waste of the amino acids that it is composed of. Hemoglobin is too big to be produced in the skin cells and then be transported to the blood cells. Therefore, hemoglobin is made in the red blood cells, where they can be used.

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