a few protein questions

[nemolala]

so i was reading up on the primary structure of proteins and it said that proteins with primary structure are least affected by increased temperature. why?

does it have something to do with the bonding?

2. this may sound dumb but you know alpha amino acid or '2 amino acid' ...it said that its called 2-amino acid due to carboxyl, amino group and z group being all on the second carbon

so my question is how can they be on the second carbon if a second carbon only can join to two things
get me?

like in HC, its never like ch3ch3ch2ch3

thank you

[Greatness]

1) Because the bonds in secodary structure are hydrogen, tertiary structure are hydrogen, dipole dipole and others. The primary structure consists of peptide bonds which i think are stronger than the others so they are least affected by heat.

2) General strucutre of an AA:
       

       H       O
       |      //
H2-N-C - C
       |      \
       R      OH

As you can see the second carbon is the middle carbon. It has a H, NH2 and COOH attached to it which exxist in every AA. The difference between AA are the R groups - so the side chains.

[Charmz]

1. The reason primary structures of proteins are not denatured is because the structure is linear and does not have a three dimensional shape. When a tertiary or secondary structure of a protein denatures, it is uncoiled and does not function as it should, the primary structure does not have a specific function/shape therefore nothing will be affected. Thus being said, primary structures can be destroyed if exposed to extreme pH.

2. I'm not sure.

[nemolala]

1) Because the bonds in secodary structure are hydrogen, tertiary structure are hydrogen, dipole dipole and others. The primary structure consists of peptide bonds which i think are stronger than the others so they are least affected by heat.

2) General strucutre of an AA:
       

       H       O
       |      //
H2-N-C - C
       |      \
       R      OH

As you can see the second carbon is the middle carbon. It has a H, NH2 and COOH attached to it which exxist in every AA. The difference between AA are the R groups - so the side chains.

ok just one more then when naming the carbon shouldnt it be 1 than two. cause you always give it lowest number.. and that diagram is part of a protein yea its not the hole thing am i right?

[Greatness]

Yes this is an amino acid which is a monomer of a protein. Hmm i think i know what youre trying to say when naming this, but i dont think you shold worry about it that much because its unlikely that we would have to name an amino acid. Anyway their structures and names are on the databooklet, so it would be a free mark!

[Mao]

In amino acids (disregarding the Z group), the carboxyl group takes precedence in naming. Thus that carbon is 1. The neighbouring carbon is 2, and the amine group is attached to carbon 2. Thus 2-amino acid.

[Bozo]

Aspartic acid is needed to make important proteins in the body, yet it is described as a non-essential amino acid. Explain.

[Mao]

The body can synthesize non-essential amino acids, therefore it is not too important for us to have those in our diets. 'Essential' amino acids are those our body cannot synthesize, and thus must be obtained from food.