Our first stop on this leg of our voyage is at the deepest spot in the ocean called the

The deepest spot in the ocean is called Challenger Deep.  It is 10924 meters deep.  It is in the Pacific Ocean, at the southern end of the Mariana Trench near the Mariana Islands group.

Six amino acids have side chains that are polar but not charged. these are serine (ser), threonine (thr), cysteine (cys), asparagine (asn), glutamine (gln), and tyrosine (tyr). these amino acids are usually found at the surface of proteins, as discussed in the proteins 2 module.