00:01
Hello everyone, in this question we have been said that the tertiary structure disulfide linkages occurs between which amino acid? so, there are only two amino acid which has the sulfur in it and that here is the cysteine and methionine.
00:21
So, if you look at the structure of cysteine it is the carboxylic group here c h d amino group here it is c h 2 and here is the sulfur present in the cysteine.
00:36
This here is the structure of methionine.
00:41
So, it is c h 2 here it is plus c h 2 s and c h 2.
00:49
So, this here is the structure of methionine.
00:53
Now, the sulfur present in the cysteine will form bond with the other cysteine or any other amino acid and this here is involved in the covalent bonding but the sulfur present in methionine is not involved in any of the bonding.
01:11
So, that means there must be the cysteine present for the disulfide to be formed.
01:16
So, here first option says cysteine and cysteine.
01:20
So, both these sulfur here can form the disulfide bond in the cysteine.
01:26
Then option b says cysteine and serine but here serine does not have the sulfur in it...