1. Take a rectangular origami paper and fold it in half. 2. Then fold it partially, to make a crease on top. 3. Fold the two upper corners to form a triangle. 4. Now fold both the bottom layers of the ...

T-cells are an important component of our immune system: with the receptors they carry on their surface, they can recognize highly specific antigens. Upon detection of an intruder, an immune response ...