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cr2

Complement receptor type 2 (CR2), also known as complement C3d receptor, Epstein-Barr virus receptor, and CD21 (cluster of differentiation 21), is a protein that in humans is encoded by the CR2 gene.
CR2 is involved in the complement system. It binds to iC3b (inactive derivative of C3b), C3dg, or C3d. B cells express CR2 receptors on their surfaces, allowing the complement system to play a role in B-cell activation and maturation

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  1. Capin JRo

    CR2 battery powerd wepononred light

    I currently have an optic on my AR and a pistol mounted light on my side arm that take CR2 batteries. I want to add a light to my AR that takes CR2 batteries "M-loc mounted preferred" but I'm having trouble finding one. My budget is around $150 and I am running this on a 12" pistol so...
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