BIO-CHEM HELP

pls

>>8386893
okay so i figured out the N-terminal (right side) still dont know what amino acid residue the DOTA is attached to and i now need to find the amino acid residues for the entire polypeptide

is the first one on the right methionine? methionine is the only amino acid with sulfur but its one more carbon away from the alpha carbon than the one in this pic

>>8386959
nevermind cysteine also has a sulfur atom so its that

coming along on the right side (no thanks to you brainlets) i still cant figure out what the residue attached to the DOTA is. I dont know of any amino acid that has an ether in it...

>>8386893
N terminal is cysteine

C terminal is lysine

DOTA is indirectly connected to threonine through the ethlyene glycol bridge, and the threonine is connected to the amine of lysines functional group

>>8387008
>Calls others brainlets without being able to figure it out themself

>>8387072
lol i said brainlets knowing someone was gonna get butthurt and finally help me out, thanks for the b8 m8

>>8387062
thanks a bunch man

>>8387062
are you sure its not serine instead of threonine? i dont see that methyl group that threonine has?

>>8387008
>>8387062
>>8387110
What are you fags talking about?
It's attached to the c terminal lysine, through some weird ether crosslinker.

>>8387153
so lysine is the final residue?

>>8387166
Yes, open your ears bitch, although I guess the linker is technically an amino acid since it has a carboxyl group and an amino group with all the ethers in between.

File: C997860.png (6KB, 577x213px) Image search: [Google]

6KB, 577x213px

>>8387245
another question concerning pic related, the blood stream is filled with cystine but not cysteine. what in our blood oxidizes it to make the disulfide bond and what is the change in oxidation states?

>>8387271
> the blood stream is filled with cystine but not cysteine. what in our blood oxidizes it to make the disulfide bond
>what in our blood oxidizes it
>oxidize
Gee, I wonder if it could be oxygen... Do your own fucking homework.

>>8387291
lol i thought that was too simple of an answer, thanks though

>>8387153
>>8387245

Threonine is attayched to the amine group the side chain of lysine, which has its carboxylic acid group free

It helps if you actually pay attention you daft cunt

File: Brainlets.png (34KB, 993x249px) Image search: [Google]

34KB, 993x249px

>>8387153
>>8387110
>>8387094

>>8387412
the one circled on the far right is cysteine not serine

>>8387448
Yeah, my mistake on that, slightly sleep deprived

>>8387388
>>8387412
>>8387448
>>8387525
Fucking high schoolers. Look at the alpha carbon of your "serine/threonine".

>can't tell which side is n or c terminus

Are you taking a biochem class for retards or something

Science hurts my brain :(