The reactants and product should be identified given the reaction. Concept Introduction: Chemical equation is a short representation of the chemical reaction . The reacting substance are present in left side of the arrow and the products are present in right hand side of the arrow. The conditions at which the reactions takes place is entered above and below the arrow. By looking at a chemical equation we can identify the reactant and the product. Physical change the substance is does not change it jest appearance only changed while the new substance is not created.in chemical changes where there is a chemical reaction a new substance formed and energy is either given off or absorbed.

Question

A protein biochemist attempted to determine the amino acid sequence of a decapeptide. The results from the trypsin, chymotrypsin, and cyanogen bromide treatments are shown: ⚫ Trypsin digestion gave two fragments with multiple residues (not in order): • T1: Ala, Arg, Phe, Gly, Thr, Trp, Tyr o T2: Lys, Met, Val Chymotrypsin digestion gave four fragments with multiple residues (not in order): • CT1: Ala, Phe • CT2: Thr, Trp • CT3: Lys, Met, Tyr, Val 。 CT4: Arg, Gly ⚫ Treatment with cyanogen bromide yielded a single amino acid, methionine, and a nonapeptide. What is a possible sequence of the decapeptide? Use three-letter abbreviations in your answer, and add a dash between each residue.

Answer 1

Question

Chapter 1, Problem 1.44ASP

(a)

Interpretation Introduction

Interpretation:

The reactants and product should be identified given the reaction.

Concept Introduction:

Chemical equation is a short representation of the chemical reaction. The reacting substance are present in left side of the arrow and the products are present in right hand side of the arrow. The conditions at which the reactions takes place is entered above and below the arrow. By looking at a chemical equation we can identify the reactant and the product.

Physical change the substance is does not change it jest appearance only changed while the new substance is not created.in chemical changes where there is a chemical reaction a new substance formed and energy is either given off or absorbed.

(b)

Interpretation Introduction

Interpretation:

Interpretation:

Which substances are chemical compound and elements should be identified in the given reaction.

Concept Introduction:

Pure substance: The substance that has a uniform (or) homogeneous chemical composition throughout.

Mixture: It is blend of two or more substance, each of which retains its chemical identically.

Chemical formula: It is one elements combine to from a chemical compound, symbol are combined to produce chemical formula which use subscript to identify how many od atoms of each element are in a given chemical compound. For example the formula (H₂O) represents water it contains two hydrogen atoms combined with one oxygen atoms.

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A protein biochemist attempted to determine the amino acid sequence of a decapeptide. The results from the trypsin, chymotrypsin, and cyanogen bromide treatments are shown: ⚫ Trypsin digestion gave two fragments with multiple residues (not in order): • T1: Ala, Arg, Phe, Gly, Thr, Trp, Tyr o T2: Lys, Met, Val Chymotrypsin digestion gave four fragments with multiple residues (not in order): • CT1: Ala, Phe • CT2: Thr, Trp • CT3: Lys, Met, Tyr, Val 。 CT4: Arg, Gly ⚫ Treatment with cyanogen bromide yielded a single amino acid, methionine, and a nonapeptide. What is a possible sequence of the decapeptide? Use three-letter abbreviations in your answer, and add a dash between each residue.

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Poly-L-leucine in an organic solvent such as dioxane is a helical, whereas poly-L-isoleucine is not. Why do these amino acids with the same number and kinds of atoms have different helix-forming tendencies? L-isoleucine's methyl group sterically interferes with α-helix formation, whereas L-leucine's methyl group does not interfere. L-isoleucine lacks an NH group that can donate a hydrogen bond to stabilize an a helix, whereas L-leucine has an NH group. L-isoleucine contains a hydrogen-bond acceptor in close proximity to the main chain, whereas L-leucine lacks this group. L-isoleucine's ring structure prevents it from assuming the op value to fit into an a helix, whereas L-isoleucine does not have a ring structure.