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Sulfur has six valence electrons, meaning that each atom of this element has six electrons in its outermost shell.
When charged amino acids within the interior of a protein attract, they form structure like salt bridges are are significant in determining the precise shape of the protein. This is because they attract one another strongly as opposed to the same charged molecules in a polar solvent like water.
Brainstem.
The brainstem is the portion of the central nervous system that's located between the spinal cord and the d<span>iencephalon and it occupies the posterior cranial fossa in front of the cerebellum. It is divided into three parts: the rachidian bulb, the pons, and the midbrain.
It's in the brainstem that can be found the commanding nucleus of the most basic homeostatic mechanisms such as heart rate, breathing, and n</span><span>ociception.</span>
