Which two layers are approximately the same age?

This part insulates the reaction chamber from the transfer of heat to or from the surrounding environment

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur

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.