| This is achieved by the propagation of the chemotactic signal, in a manner rather similar to the conduction of a nerve impulse. |
| The biochemistry and structural biology of the chemotactic phosphorelay is now understood in some detail. |
| Leukocytes are attracted to the injury site by chemotactic proteins known as chemokines, which are secreted by endothelial cells of the blood vessels. |
| Foam cells also release chemotactic and growth-promoting substances reminiscent of a typical inflammatory response following an infection or allergic episode. |
| In general, chemotactic and phagocytic responses are significantly reduced. |
| The stimulated macrophages secrete chemotactic factors such as lymphokines, which then attract T-helper lymphocytes. |
