Question

In this exercise, you will compare the amino acid sequence from the aphid to the amino acid sequences of the other species to identify how similar they are. As a first step, you will compare the aphid sequence (Acyrthosiphon) to a bacterial sequence (Pantoea).

The sequences below show the first 60 amino acids of one polypeptide, using the one-letter abbreviations for the amino acids. An underscore (_) indicates a gap inserted in a sequence to optimize its alignment with the corresponding sequence in Arabidopsis.
Acyrthosiphon (aphid) IKIIIIGSGV GGTAAAARLS KKGFQVEVYE
Pantoea (bacterium) KRTFVIGAGF GGLALAIRLQ AAGIATTVLE
Acyrthosiphon (aphid) KNSYNGGRCS IHR_HNGHRF DQGPSL__YL
Pantoea (bacterium) QHDKPGGRAY VWQ_DQGFTF DAGPTV__IT

At how many positions are the amino acids the same between the two species?

Answer 1

Answer:

The Amino acids are the same between the species at Twenty positions

Explanation:

The positions are 6, 7, 9, 11, 12, 14, 16, 18, 19, 23, 28, 30, 36, 37, 38, 47, 50, 51, 53, and 54.    

For the first given 60 amino-acid, there are 20 positions having an identical Amino acid between the aphid and the bacterium Pantoea.

In order to compare the sequences from the rest of the species to the aphid sequence  a computer can be use.