I'm looking for a table or another kind of schema where I can find which type of carbon atoms (sp3, sp2 etc.) are present in each amino-acid. In my biochemistry books these informations are not available.

I looked also on pubchem (e.g. glycine), and I found some information about alanine, aspartic acid, methionine.

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  • $\begingroup$ For those who downvote my question, please specify why in order to improve it $\endgroup$ Apr 14, 2021 at 18:09
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    $\begingroup$ I didn't downvote you but it is beneficial if you put how much work you have been done so far. Also, please clarify your info (e.g., see Nisarg Bhavsar's comment elsewhere). $\endgroup$ Apr 14, 2021 at 18:18
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    $\begingroup$ For instance, carboxylic carbon and carbonyl oxygen in glycine is $\mathrm{sp^2}$. The rest of the atoms in the molecule is $\mathrm{sp^3}$ ($\ce{C,N,O}$. It is more complicated than that but for your level of knowledge, this is good enough $\endgroup$ Apr 14, 2021 at 18:24
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    $\begingroup$ Also remember, the oxygens on carbonyl groups in both structures (alanine and aspartic acid) you have just put are $\mathrm{sp^2}$. $\endgroup$ Apr 14, 2021 at 18:29
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    $\begingroup$ It is not tabulated because you should be able to figure it out for yourself if you ever need to. If you pick up a good general chemistry textbook somewhere it will explain hybridisation. And there are lots of resources on the Internet to learn from, too. Mathew's comments are pretty much it, actually. $\endgroup$ Apr 14, 2021 at 19:00

1 Answer 1


Sr. No. Name Structure Hybridization and Number of Carbon
1 Serine Serine $$sp=0\\sp^2=1\\sp^3=2$$
2 Threonine Threonine $$sp=0\\sp^2=1\\sp^3=3$$
3 Tyrosine Tyrosine $$sp=0\\sp^2=7\\sp^3=2$$
4 Asparagine Asparagine $$sp=0\\sp^2=2\\sp^3=2$$
5 Glutamine Glutamine $$sp=0\\sp^2=2\\sp^3=3$$
6 Glycine Glycine $$sp=0\\sp^2=1\\sp^3=1$$
7 Alanine Alanine $$sp=0\\sp^2=1\\sp^3=2$$
8 Cysteine Cysteine $$sp=0\\sp^2=1\\sp^3=2$$
9 Valine Valine $$sp=0\\sp^2=1\\sp^3=4$$
10 Leucine Leucine $$sp=0\\sp^2=1\\sp^3=5$$
11 Isoleucine Isoleucine $$sp=0\\sp^2=1\\sp^3=5$$
12 Proline Proline $$sp=0\\sp^2=1\\sp^3=4$$
13 Methionine Methionine $$sp=0\\sp^2=1\\sp^3=4$$
14 Phenylalanine Phenylalanine $$sp=0\\sp^2=7\\sp^3=2$$
15 Tryptophan Tryptophan $$sp=0\\sp^2=9\\sp^3=2$$
16 Aspartic acid Aspartic acid $$sp=0\\sp^2=2\\sp^3=2$$
17 Glutamic acid Glutamic acid $$sp=0\\sp^2=2\\sp^3=3$$
18 Lysine Lysine $$sp=0\\sp^2=1\\sp^3=5$$
19 Arginine Arginine $$sp=0\\sp^2=2\\sp^3=4$$
20 Histidine Histidine $$sp=0\\sp^2=4\\sp^3=2$$
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    $\begingroup$ Fantastic table @NisargBhavsar $\endgroup$ Apr 14, 2021 at 19:44
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    $\begingroup$ Which app you used to draw the structures? $\endgroup$
    – Eclipse239
    Apr 14, 2021 at 19:49
  • $\begingroup$ @Eclipse239 I used the online interface at py-chemist.com $\endgroup$ Apr 14, 2021 at 19:51

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