Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Three tubulin protofilaments are highlighted. α-tubulins are dark green, and β- tubulins are light green. Red outlines mark the second to terminal layers of tubulins. In the GTP-state of tubulins those layers are under lower bending stress, and so they rate limit assembly-disassembly at plus- and minus-ends of the microtubule.
