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Chapter 5: Q20P (page 128)

Draw a different phylogenetic tree based on the data in Problem 19.

Short Answer

Expert verified

The required phylogenetic tree is:

Problem presents data in a variety of ways.

Step by step solution

01

Explanation of Concept

A phylogenetic tree, also known as a phylogeny, is a diagram that shows how various species, animals, or genes descended from a common ancestor.

02

Drawing Phylogenetic trees

We compare amino acid sequences of given proteins to create phylogenetic trees. Proteins with more differences have evolved at a faster rate. Proteins and have only one difference, putting them near together on the phylogenetic tree, however Protein has three differences from both, putting it in a different branch.

Therefore, Problem presents data in a variety of ways.

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Most popular questions from this chapter

Explain why a certain protein has an apparent molecular mass of 90kDwhen determined by gel filtration and 60kDwhen determined by SDS-PAGE in the presence or absence of 2-mercaptoethanol. Which molecular mass determination is more accurate?

What types of information can be retrieved from a protein sequence database?

Identify the first residue obtained by Edman degradation of cytochrome c from (a) Drosophila, (b) baker鈥檚 yeast, and (c) wheat germ (see Table 5-6).

Treatment of a polypeptide with 2-mercaptoethanol yields two polypeptides:

1. Ala鈥揤al鈥揅ys鈥揂rg鈥揟hr鈥揋ly鈥揅ys鈥揕ys鈥揂sn鈥揚he鈥揕eu

2. Tyr鈥揕ys鈥揅ys鈥揚he鈥揂rg鈥揌is鈥揟hr鈥揕ys鈥揅ys鈥揝er

Treatment of the intact polypeptide with trypsin yields fragments with the following amino acid compositions:

3. (Ala, Arg, Cys2, Ser, Val)

4. (Arg, Cys2, Gly, Lys, Thr, Phe)

5. (Asn, Leu, Phe)

6. (His, Lys, Thr)

7. (Lys, Tyr)

Indicate the positions of the disulfide bonds in the intact polypeptide.

(a) In what order would the amino acids Arg, His, and Leu be eluted from a carboxymethyl column at pH6 ?

(b) In what order would Glu, Lys, and Val be eluted from a diethylaminoethyl column at pH 8?
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