Proteins Ap Biology

Kirstie Javier AP Biology Period 4 November 14, 2011 Proteins Proteins ar biochemical compounds consisting of wholeness or more polypeptides typically folded into a globular or fibrous form, facilitating a biological function. Some types of chemical deposits/ interactions atomic number 18 disulfide bonds, hydrogen bonds, bean bonds, and aquaphobic interactions. Disulfide bonds form when two one C molecules join in concert to form a bond between their two sulfur atoms. Such bonds cross-link polypeptide set up or portions of chains. Because they argon non cold covalent bonds, they ar real strong bonds and not easily broken. They are considered to be disunite of primary structure, although they do contribute to the three-dimensional conformation of the proteins. total heat bonds form when a hydrogen atom is covalently bonded to one negatively charged atom (usually group O or nitrogen) and is simultaneously attracted to another(prenominal) electronegative a tom. A aerated R-group in one originate of a polypeptide chain tidy sum attract an oppositely charged R-group in another part of the chain. The force of such(prenominal) an inactive attraction is the ionic bond, sometimes called a saltiness linkage, salt bridge, or electrostatic bond. Non polar R-groups go to cluster in concert in water. These weak associations are called hydrophobic interactions.

When the polypeptide chain folds, the hydrophobic R-groups tend to be stiff to each other in the interior of the folded chain, whereas hydrophilic R-groups tend to be on the outside, attracted to water. The diagram below illustrates some hyd rophobic interactions between R-groups. Hydr! ophobicity of various amino acids. About 12 percent of your entire body plenitude is protein. All types of protein are do from amino acids. Some of these are essential, meaning they cannot be make by the body and and so must be eaten. Others are produced in the body, so they are still very fundamental; just not essential. Without protein, more body functions wouldnt occur, such as muscle contractions....If you pauperism to get a entire essay, order it on our website: BestEssayCheap.com

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