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My friend made the claim that there exists a protein in your eye responsible for vision. This protein is sensitive to different wavelengths of light, and when it gets hit by the right wavelength, it kinks. In order to be un-kinked, he claimed, it has to be shipped down to the liver, and then back up to the eye.
He teaches organic chemistry at UCLA, so I trust him a little bit. But I couldn't find this with a quick search. Anyone know if this is legit?
The protein is called rhodopsin and the bit that gets kinked up is called retinol. Normally when light hits it, it does trans to cis isomerization at the 11th carbon. 'kinks up' is a pretty apt way of describing it.
I'm not familiar with the shipped down to the liver part, but I'm guessing that the photo reaction of the retinol with itself or the protein must occasionally make the rhodopsin-retinol complex unfunctional - perhaps by the double bonds cross linking to other atoms in the retinol or to the protein. As I understood it the retinol just straightens out again. This reference shows that in the presence of rhodopsin, 11-cis retinol will become all trans again normally.
There should be enzymes in the liver that can recycle some messed up retinol configurations. Its probably not the main route through your body. Retinol is stored in the liver from dietary intake, and then shipped via retinol binding proteins to the eye. So that is the organ which is the source of retinol in the human body (and probably most animals). It should catch damaged retinols and refurbish them the same way it does those taken in via the diet.
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Solution to report undefined a error when using jquery
When the project uses easyUI, the foreground reports an error, type error: A is undefined. I see that the error location is actually the source code of JQ… It’s impossible. I searched a lot of information on the Internet, but I didn’t solve the problem. After nearly a month’s thinking, I seem to have found the cause of this problem. It may not be right. It only represents personal profile. If there is a positive solution, please let me know. Thank you.
The error screenshot is as follows:
The reasons are as follows: I have such a piece of code in JS:
Note that this code is not put in any function, nor is it wrapped with $(function () <>). Just this sentence is put directly in JS code. This is all the cases that report this error in my project. My preliminary analysis is because JS thinks that there is no method to call this sentence, so it reports an error.
Solution: wrap the isolated statements in JS with $(function () <>), or write them in a function,
Like this, you can’t make a mistake at the front desk
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