CDR (Complementarity Determining Region)

Complementarity Determining Regions (CDRs) are specific parts of an antibody molecule responsible for recognizing and binding to a target, such as a virus or bacteria. They are like the "hands" of the antibody, uniquely shaped to fit particular "shapes" on invaders, ensuring precise detection. Each antibody has several CDRs, with three main ones (CDR1, CDR2, CDR3) that provide the diversity needed to recognize a vast array of different targets. Their variability and specificity are crucial for the immune system’s ability to defend against numerous pathogens.