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The membrane attack complex (MAC) is a complex of proteins typically formed on the surface of a pathogen as a result of the activation of the host's complement system. Assembly of the MAC leads to formation of pores that disrupt the surface of the pathogen, leading to cell lysis and death.
complement system color icon vector. complement system sign. isolated symbol illustration
Innate immunity. The Immune System. Immune response. Epithelial, Complement protein, NK cell Macrophage and Dendritic cell.
Vintage-style illustration of a coffee cup with a saucer. The coffee cup features a floral pattern, and saucer complements the design. Retro coffee cup art. Vintage art drawing illustration vector.
A striking tribal-inspired geometric pattern featuring a central diamond motif with sharp, stepped edges in black, beige, and deep red tones. The design is complemented by symmetrical side border's

Free stock photoscomplemental (23)

Puzzle pieces together isolated over a white background on 3D illustrationImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/puzzle-pieces-together-isolated-white-background-42379675">Image used under license from Freestock.com</a>
Complementary drawn in pencilImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/complementary-drawn-pencil-431477683">Image used under license from Freestock.com</a>
Complementary wooden signboardsImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/complementary-wooden-signboards-418967197">Image used under license from Freestock.com</a>
Complementary realistic wood emblemImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/complementary-realistic-wood-emblem-432645793">Image used under license from Freestock.com</a>
Complementary emblem with jean textureImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/complementary-emblem-jean-texture-423198733">Image used under license from Freestock.com</a>
Complementary chalkboard emblem written on a blackboardImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/complementary-chalkboard-emblem-written-blackboard-423217210">Image used under license from Freestock.com</a>
Complementary on chalkboardImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/complementary-chalkboard-423974272">Image used under license from Freestock.com</a>
Complementary drawn in pencilImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/complementary-drawn-pencil-393197068">Image used under license from Freestock.com</a>
Complementary grunge stampImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/complementary-grunge-stamp-430655137">Image used under license from Freestock.com</a>
Complementary chalkboard emblemImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/complementary-chalkboard-emblem-423142600">Image used under license from Freestock.com</a>
Complementary chalkboard emblem on black boardImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/complementary-chalkboard-emblem-black-board-421513825">Image used under license from Freestock.com</a>
3D man tied with a rope assembling a puzzle - isolated over whiteImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/3d-man-tied-rope-assembling-puzzle-100497202">Image used under license from Freestock.com</a>
Puzzle pieces together isolated over a white background on 3D illustrationImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/puzzle-pieces-together-isolated-white-background-42379678">Image used under license from Freestock.com</a>
Single puzzle piece isolated over a white background in 3D illustrationImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/single-puzzle-piece-isolated-white-background-42379672">Image used under license from Freestock.com</a>
Single puzzle piece isolated over a white background in 3D illustrationImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/single-puzzle-piece-isolated-white-background-42378079">Image used under license from Freestock.com</a>
Single puzzle isolated over a white background in 3D illustrationImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/single-puzzle-isolated-white-background-3d-42378073">Image used under license from Freestock.com</a>
Garden arrangement in springImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/garden-arrangement-spring-143080405">Image used under license from Freestock.com</a>
Close-up of young black woman applying cosmetic brush to her left cheekImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/closeup-young-black-woman-applying-cosmetic-2852721">Image used under license from Freestock.com</a>
Angled window of college buildingImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/angled-window-college-building-1050722">Image used under license from Freestock.com</a>
Side view of young black woman applying gloss to her lipsImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/side-view-young-black-woman-applying-2849561">Image used under license from Freestock.com</a>
Side view of young black woman applying gloss to her lipsImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/side-view-young-black-woman-applying-2849562">Image used under license from Freestock.com</a>
Doorhandle and its reflection on glass office door, with retention pond in backgroundImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/doorhandle-reflection-glass-office-door-retention-951699">Image used under license from Freestock.com</a>
Doorhandle and its reflection on glass office door, with retention pond in backgroundImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/doorhandle-reflection-glass-office-door-retention-951698">Image used under license from Freestock.com</a>

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