Proteins with Similar Primary Structure and Function Can Usually Be

question 71

Multiple Choice

Proteins with similar primary structure and function can usually be grouped into families based on their degree of sequence similarity. A small region of 6 aligned amino acids in protein from 5 related species is shown below.
(1) QMADGCK
(2) QIVDLYR
(3) QIADGCK
(4) QMAEGCK
(5) QFVDLYR
Similarity is judged by a distance matrix in which each cell enumerates the number (or percent) of differences between any pair of sequences. Which of the distance matrices below reflects the differences among the five sequences shown above?

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