Related Experiment Video
Updated: Feb 5, 2026

Extraction and Analysis of Cortisol from Human and Monkey Hair
Published on: January 24, 2014
Human erythrocyte antigens in Brazilian Capuchin monkeys (Sapajus sp.)
Lucilene Silva Ruiz E Resende1, Adaize Pereira da Silva2, Patrícia Carvalho Garcia2
1Hematology Service, Department of Internal Medicine, Botucatu Medical School, São Paulo State University - UNESP, Botucatu, SP, Brazil.
Background:
Investigation of erythrocyte antigens in New World monkeys, especially in the Brazilian ones, is scant and incomplete.
Methods:
Determining the presence of 29 erythrocyte antigens from 11 human blood group systems (ABO, H, Rh, Kell, Duffy, Kidd, Lewis, P, MNS, Lutheran and Diego) on erythrocytes in nine Capuchin monkeys (Sapajus sp.).
Results:
A majority (20 of 29) of human erythrocyte antigens were not found in this monkey genus. Erythrocyte phenotyping was very similar within this animal group, as five Capuchin monkeys differed from the other four in the ABO system only.
Conclusion:
The erythrocyte phenotype for this group of animals is less diversified than in humans. Some monkey erythrocyte antigens were similar in frequency, whereas others were different from those observed in human ethnicities.
Related Concept Videos
Lifecycle of Erythrocytes
The resident phagocytic macrophages deal with these damaged cells by engulfing them and separating their globin and heme groups....
Disorders of Erythrocytes
Erythrocyte disorders can be broadly categorized into two main types: anemic and polycythemic conditions.
A low oxygen-carrying capacity of the blood due to the loss, lower production, or destruction of erythrocytes is termed anemia. Hemorrhagic anemia, for example, occurs when bleeding from an external wound or internal ulcer reduces erythrocyte counts.
On the other...
Structure and Function of Erythrocytes
The erythrocyte plasma membrane is associated with proteins such as spectrin, which forms a flexible cytoplasmic meshwork. This meshwork allows erythrocytes to twist, turn, become cup-shaped, and regain their biconcave shape as they pass through narrow capillaries. Additionally, erythrocytes can form...
Antigen Presenting Cells
T cells require the help of antigen-presenting cells (APCs), which process foreign antigens into smaller fragments that can be recognized by T cells. These APCs are highly specialized cells that efficiently internalize antigens...
Diversity of Antigen Receptors
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
Antigen Processing Pathways
MHC Class I: Presenting Endogenous...

