***urgent*** 40 points
how can earth’s layers be defined? select the two correct answers.
by their chemical compositions
by their asthenospheres
by their physical properties
by their proximities to the core
by their amounts of land area

You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine residues occur at regular intervals. what is the significance of this finding? it will be important to include cysteine in the diet of the mice. cysteine residues are required for the formation of α helices and β pleated sheets. cysteine residues are involved in disulfide bridges that form tertiary structure. cysteine causes bends, or angles, to occur in the tertiary structure of proteins.