Ancient bond holds life together, literally
Animal tissues and organs may require a specific link between sulfur and nitrogen
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2013/12/bm_S-Nbond-image.jpg?fit=860%2C460&ssl=1)
BOND OF LIFE A link between nitrogen and sulfur atoms (bond shown in green) helps hold together protein strands (yellow and white) that create a cellular scaffold essential for tissue and organ formation.
Courtesy of Jean-Philippe Cartailler, Symmation LLC