Page 142 - The Manga Guide to Biochemistry

But wait...why does one person become Type A while another becomes Type B?
What decides which blood type a person will have?

Well, blood type is determined by a certain gene, and an enzyme is created by that
gene! (We’ll come back to this later, but you can skip ahead to page 169 for more
details, if you’d like.)

Again with the enzymes! You mentioned them when we discussed fat, and now again
when we’re talking about blood types? They must be really important.

Definitely. We’ll have to get the professor to tell us more about enzymes when we
see her again later.

Yeah! By the way, is it possible that the differences in these sugar chains could
actually be related to a person’s personality? Can you really tell a person’s fortune
from their blood type?

Hmm, good question. I guess if you went out on a limb, you could say that the gene
that determines blood type might also have some kind of influence on nerve cells.
But claiming that that might actually influence one’s personality is a pretty big leap
of logic, and there’s no scientific evidence to support it.

That’s a relief. I’d hate to think that my entire personality is controlled by a bunch of
dinky little sugar chains.

I don’t care what fortune-tellers say—there’s no one in the world with a personality
like yours, Kumi...

128 Chapter 3