Biology

Biology

A natural science concerned with the study of life or living matter in all its forms and phenomena, especially in relation to their origin, growth, reproduction, structure, behaviour and evolution.

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Biology > Immunology

DiGeorge syndrome

Biology; Immunology

is a recessive genetic immunodeficiency disease in which there is a failure to develop thymic epithelium, and is associated with absent parathyroid glands and large vessel ...

diphtheria toxoid

Biology; Immunology

An immunizing preparation generated by formalin inactivation of Corynebacterium diphtheriae exotoxins. This toxoid, which is used in the active immunization of children against ...

domain

Biology; Immunology

A compact segment of an immunoglobulin or TCR chain, made up of amino acids around an S-S bond.

double-negative thymocytes

Biology; Immunology

are immature T cells within the thymus that lack expression of the two co-receptors, CD4 and CD8.

double-positive thymocytes

Biology; Immunology

are an intermediate stage in T-cell development in the thymus and are characterized by expression of both the CD4 and the CD8 co-receptor proteins.

DP, DQ, and DR molecules

Biology; Immunology

Human MHC (HLA) class II molecules of humans found on B cells and antigen-presenting cells.

effector cells

Biology; Immunology

Lymphocytes that can mediate the removal of pathogens or antigens from the body without the need for further differentiation. Effectors are distinct from naive lymphocytes, which ...