What integral membrane protein family made of two membrane-spanning chains ($\alpha$ and $\beta$)is involved in attaching cells to their extracellular microenvironment?
A)laminins
B)fibronectins
C)integrins
D)myosins
E)lysins

Question

Quizplus · Accepted Answer

Integrins are a family of integral membrane proteins made up of two membrane-spanning chains (F1F1F1S1F1F1F10 and F1F1F1S1F1F1F10) that mediate cell-cell and cell-extracellular matrix interactions. They are responsible for attaching cells to their extracellular microenvironment. Laminins and fibronectins are extracellular matrix proteins, not integral membrane proteins. Myosins are contractile proteins involved in muscle contraction, and lysins are enzymes that destroy bacterial cell walls.

What Integral Membrane Protein Family Made of Two Membrane-Spanning Chains α\alphaα

What Integral Membrane Protein Family Made of Two Membrane-Spanning Chains $\alpha$