by cantleave 37 Replies latest watchtower beliefs
Is this the same as the phrase "left-handed" amino acids and "right-handed" ones, and the fact that only 20 left-handed ones are found in organic proteins?
I might have misread this last night.
There are 22 amino acids known to make proteins (proteinogenic AA's) of these 20 make up the "universal genetic code". These are primarily l enantiomers.
Thanks.
So 4 DNA letters read as triplets give us a total of 64 codons which code for 20 amino acids, which join in specific ways to make proteins.
Where do the other 2 amino acids come from?
S elenocysteine and P yrrolysine are incorporated into proteins by biosynthetic mechanisms.
Edit: No idea how - just looked it up ;-)
Thanks!
I have been swatting up on the reverse Krebs cycle. Keep having to go back and fill in missing bits of knowledge. Khan Academy is the business!
I have been swatting up on the reverse Krebs cycle.
I am sorry to say like a lot of biochemistry I downloaded this stuff into my short term memory for the inevitable exam question and then promptly forgot it!
cantleave-thanks very much for addressing those points I made very interesting, and it's all coming back to me. I have never heard of chiral chomatography, sounds mind blowing.
I have used a TIMS (thermal ionisation mass spec) ICP-MS (inductively coupled plasm mass spec) to separate uranium isomers, and the general common chromatography instruments like HPLC ans GC (high pressure liquid chromatography) and (gas chromatography).
By the way, I saw you responded two days ago but my computer seems to be playing up and I am just reading your post now
Hey cofty,
Thanks for your concern. I wrote three big posts on this thread, so my day did get better. I love chemistry, its sets a fire in me, thankfully my kids both love science too, but my daughter is better at physics.
cantleave-I look forward to your next thread about part two of the experiment. I cannot read the papers, way over my head I am afraid
You have used much more advanced techniques than I ever have - FTIR was about as advanced as I ever got. 25 years ago when I was studying ICP-MS was the very cutting edge of analysis.
Double post!
I am sorry to say like a lot of biochemistry I downloaded this stuff into my short term memory for the inevitable exam question and then promptly forgot it!
hahahaha!!!! lol!!!!
I was the same with physical chemistry, my teacher was a nutty professor. I just learnt shrodingers wave equation and regurgitated it in the exam. At least you remembered was a positron is (another thread). Phys chem was a headache for me.
