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PROTEIN INCLUSION


E. coli competent cells are usually used to express target protein. Around 70% of the time, protein inclusion bodies are expressed. This means that the target protein is expressed but it is not folded properly, or not folded at all. This is a problem for scientists wanting to do kinetic assays and/or crystallization. No one really knows how inclusion bodies are formed but they are usually expressed when the protein is over expressed.


ERYTHROCYTE INCLUSION


Normally a red blood cell does not contain inclusions in the cytoplasm. However, it maybe seen because of hematologic disorders

There are 3 kinds Of Erythrocyte Inclusions

1.Developmental Organelles


- small, round fragments of the nucleus resulting from Karyorrhexis or nuclear disintegration of the late Reticulocyte and stain reddish-blue with Wright Stain .

  • Basophilic Stipplings


-this stipplings is iether fine or coarse, deep blue to purple staining inclusion that appears in Erythrocytes on a dried Wright Stain.

  • Pappenheimer Bodies


- are siderotic granules which are small, irregular, dark-staining granules that appear near the periphery of a young Erythrocyte in a Wright Stain .


- young red cells that no longer have nucleus but still contain some RNA.

  • Cabot Rings


- ring-like structure and may appear in erythrocytes in Megaloblastic Anemia or in severe Anemias , Lead Poisoning , and in dyserythropoiesis, in which Erythrocytes are destroyed before being released from the Bone Marrow .

2.Abnormal Hemoglobin Precipitation

  • Heinz Bodies


- round bodies, refractile inclusions not visible on a Wright Stain film. It is best identified by supravital staining with basic dyes.


- Alpha Thalasemia , greenish-blue inclusion bodiesappear in many Erythrocytes after 4 drops of blood is incubated with 0.5mL of Brilliant cresyl blue for 20 minutes at 37°C

3.Protozoan Inclusion