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Talk:Aquaporin

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	Aquaporin has been listed as one of the Natural sciences good articles under the good article criteria. If you can improve it further, please do so. If it no longer meets these criteria, you can reassessit.
Article milestones Date Process Result March 6, 2017 Good article nominee Listed April 24, 2023 Good article reassessment Kept
Current status: Good article

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Good, but "could do better"!

… Two hydrophobic loops contain conserved asparagine-proline-alanine NPA motif. Because aquaporin is usually always open and is prevalent in just about every cell type, it causes water to almost always flow to down its concentration gradient. This leads to a misconception that water readily passes through the cell membrane down its concentration gradient. …

The first of these two sentences contains three puzzles for the non-specialist:

1. What does "conserved" mean in this context? (I have no idea.)
2. What is "NPA" and how does it relate to the preceding compound word "asparagine-proline-alanine"? (Ithink it's an acronym of sorts, thus: "asparagiNe-Proline-Alanine", but who knows?)
3. What does "motif" mean in this context? (I have only a glimmer of an idea, and it's this: in music and the plastic arts, a "motif" is a small assemblage that occurs repeatedly, sometimes with variations. Is the usage in biochemistry similar?)

This fragment: "it causes water to almost always flow to down its concentration gradient" contains two grammatical infelicities (since it would be better as "it almost always causes water to flow down its concentration gradient") and two further puzzles:

1. what is this "concentration gradient"?
2. which direction is "down" that gradient?

I propose to improve the grammar, but will leave the rest to somebody better informed than I, meanwhile marking it {{explain}}. yoyo (talk) 04:41, 5 November 2019 (UTC)[reply]