Your friend discovered a new multicellular organism living under the polar ice caps, and brought it back to the laboratory, where it seems to be growing well. Your friend is particularly interested in the proteins that allow this organism to survive in extreme cold. Because he is interested in proteins and because he has learned that most of the human genome does not code for exons, he is considering sequencing expressed sequence tags from this organism. What do you think the pitfalls of this approach might be? Explain.