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Related Concept Videos

Blood Types02:20

Blood Types

Human blood is classified into different types based on the presence of antigens on the red blood cell's surface and antibodies in the plasma. Proper identification of blood type is essential for successful blood transfusion. The International Society of Blood Transfusion has identified 38 human blood types based on the surface antigens on the red blood cells. The most common types are ABO, Rh, and MNS blood types.
ABO blood group
ABO antigens are glycoproteins encoded by genes present on...
Blood Typing01:10

Blood Typing

Understanding an individual's blood group is a critical component of transfusion medicine. It ensures compatibility in blood transfusions, organ transplants, and even during pregnancy. Determining these blood groups involves the ABO and Rh blood typing systems, utilizing specific antigens and corresponding anti-sera to identify an individual's blood type.
Antigens are protein molecules that reside on the surface of red blood cells (RBCs). The ABO and Rh blood typing systems target antigens A,...
Human Genetics01:28

Human Genetics

Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
The ABO Blood Group01:12

The ABO Blood Group

The ABO blood group system is a critical element of transfusion medicine, essential for determining blood compatibility in transfusions and organ transplants. It is based on specific antigens, or agglutinogens, present on the surface of red blood cells (RBCs) and corresponding antibodies, or agglutinins, in the blood plasma.
Antigens in the ABO Blood Group System
Antigens are substances that can trigger an immune response, leading to the production of antibodies. In the ABO blood group system,...
Genetic Variation01:25

Genetic Variation

Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles, which...
Drug toxicity: Idiosyncratic Reactions01:16

Drug toxicity: Idiosyncratic Reactions

Idiosyncratic drug reactions represent abnormal chemical responses that vary significantly among individuals, ranging from extreme sensitivity to low doses to insensitivity to high doses. These reactions often occur due to the drug's covalent binding with serum proteins, forming a foreign hapten that triggers an immunotoxicological response. The variability in drug reactions has a strong pharmacogenetic foundation, with genetic differences crucial in how individuals metabolize drugs. For...

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Related Experiment Video

Updated: Jun 19, 2026

Characterizing Mutational Load and Clonal Composition of Human Blood
07:58

Characterizing Mutational Load and Clonal Composition of Human Blood

Published on: July 11, 2019

ON INDIVIDUAL DIFFERENCES IN HUMAN BLOOD.

K Landsteiner1, P Levine

  • 1Laboratories of The Rockefeller Institute for Medical Research.

The Journal of Experimental Medicine
|October 30, 2009
PubMed
Summary
This summary is machine-generated.

Human blood can be differentiated beyond blood groups using special immune sera. This reveals new agglutinable factors, indicating significant biochemical diversity among individuals.

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Area of Science:

  • Immunology
  • Biochemistry
  • Hematology

Background:

  • Standard human blood typing relies on ABO and Rh systems.
  • The existence of additional blood group factors beyond established systems is suspected.
  • Understanding blood component variability is crucial for transfusion medicine and diagnostics.

Purpose of the Study:

  • To investigate the potential for differentiating human blood beyond known blood groups.
  • To identify novel agglutinable factors in human erythrocytes.
  • To assess the implications of these findings on current blood group classifications.

Main Methods:

  • Utilized special agglutinating immune sera for blood differentiation.
  • Conducted serological tests to detect agglutination reactions.
  • Analyzed the presence of agglutinins in normal human sera.

Main Results:

  • Demonstrated clear differentiation of human blood using specific immune sera, independent of standard blood groups.
  • Identified several previously undetected agglutinable factors on erythrocytes.
  • Found no demonstrable agglutinins for these new factors in normal human sera.

Conclusions:

  • Human blood exhibits a higher degree of biochemical differentiation than previously recognized.
  • The discovery of new agglutinable factors does not alter the established four main blood groups.
  • These findings open avenues for more precise individual identification and potentially new transfusion compatibility criteria.