Chondrocyte
Crosslinking agents, such as formaldehyde or glutaraldehyde, are often used to harden compounds around protein fibers by forming chemical bonds between the protein molecules. This process helps to stabilize the structure of the protein fibers and prevent degradation.
The solid protein fibers, which form a mesh over wounds, are called "fibrin".
Regenerated fibers are typically made from natural materials such as cellulose (e.g. viscose, lyocell) or protein (e.g. soy or milk protein). These fibers undergo a process of dissolving the raw material and spinning it into fibers, offering a sustainable alternative to synthetic fibers.
Elastic fibers made of the protein elastin has a coiled structure which allows it to stretch and recoil. Fibers can stretch up to 150 percent of their relaxed state length without breaking.
muscle fibers
Protein fibers help to build and to repair body tissues.
collagen
Nucleus
Spindle fibers.
Collagen
Fibrous protein
Spindle fibers are made of microtubules, which are long, thin protein structures made of tubulin. These fibers play a vital role in the segregation of chromosomes during cell division.