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L-Amino Acid Structures

Backbones are oriented amino(left) to carboxy(right)

R-group sidechains project upward from the backbone alpha carbon

Except for the alpha carbon, the CPK atom coloring scheme is used: C, H, N, O, P, S

Name colors indicate: hydrophobic, polar (non-charged), polar (charged-basic), polar (charged-acidic)

Rotate 180o:
alanine ; valine ; leucine ; isoleucine

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alanine ; valine ; leucine ; isoleucine


alanine (ala = A)

valine (val = V)

leucine (leu = L)

isoleucine (ile = I)
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methionine ; proline ; phenylalanine ; tryptophan

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methionine ; proline ; phenylalanine ; tryptophan


methionine (met = M)

proline (pro = P)

phenylalanine (phe = F)

tryptophan (trp = W)
Rotate 180o:
glycine serine ; threonine

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glycine serine ; threonine


glycine (gly = G)

serine (ser = S)

threonine (thr = T))
Rotate 180o:
glutamine ; asparagine ; cysteine ; tyrosine

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glutamine ; asparagine ; cysteine ; tyrosine


glutamine (gln = Q)

asparagine (asn = N)

cysteine (cys = C)

tyrosine (tyr = Y)
Rotate 180o:
glutamic acid ; aspartic acid ; arginine ; lysine ; histidine

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glutamic acid ; aspartic acid ; arginine ; lysine ; histidine


glutamic acid (glu = E)

aspartic acid (asp = D)

arginine (arg = R)

lysine (lys = K)

histidine (his = H)
Other Sites With Amino Acid Structures:
C4 at Cabrillo College
Amino Acid Structures/Properties (U.C. Davis)
Amino Acid Viewer at Carnegie Mellon
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