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Line 1: − An '''amino acid''' is an [[organic compound]] containing an [[amine]] (-NH<sub>2</sub>) group and a [[carboxylic acid]] (-COOH) group. These two different [[functional groups]] make amino acids [[bifunctional]].+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
6 points! (large merge)
'''Amino acids''' are a group of 21 different [[molecule]]s which, when [[chemical bond|bonded]] in sequence, make up [[protein]]s. They consist of an [[organic]] side chain bonded to an ''[[amine]]'' and a ''[[carboxylic acid]]'' (-COOH) group (hence the name ''amino acid''). These two different [[functional groups]] make amino acids [[bifunctional]].
==Table of Properties==
A table of amino acid name, abbreviation and properties is as follows:
{| class="wikitable"
! Amino Acid
! 3-Letter
! 1-Letter
! Side chain polarity
! Side chain acidity or basicity
|- align="center"
| Alanine
| Ala
| A
| nonpolar
| neutral
|- align="center"
| Arginine
| Arg
| R
| polar
| strongly basic
|- align="center"
| Asparagine
| Asn
| N
| polar
| neutral
|- align="center"
| Aspartic acid
| Asp
| D
| polar
| acidic
|- align="center"
| Cysteine
| Cys
| C
| polar
| neutral
|- align="center"
| Glutamic acid
| Glu
| E
| polar
| acidic
|- align="center"
| Glutamine
| Gln
| Q
| polar
| neutral
|- align="center"
| Glycine
| Gly
| G
| nonpolar
| neutral
|- align="center"
| Histidine
| His
| H
| polar
| weakly basic
|- align="center"
| Isoleucine
| Ile
| I
| nonpolar
| neutral
|- align="center"
| Leucine
| Leu
| L
| nonpolar
| neutral
|- align="center"
| Lysine
| Lys
| K
| polar
| basic
|- align="center"
| Methionine
| Met
| M
| nonpolar
| neutral
|- align="center"
| Phenylalanine
| Phe
| F
| nonpolar
| neutral
|- align="center"
| Proline
| Pro
| P
| nonpolar
| neutral
|- align="center"
| Serine
| Ser
| S
| polar
| neutral
|- align="center"
| Threonine
| Thr
| T
| polar
| neutral
|- align="center"
| Tryptophan
| Trp
| W
| nonpolar
| neutral
|- align="center"
| Tyrosine
| Tyr
| Y
| polar
| neutral
|- align="center"
| Valine
| Val
| V
| nonpolar
| neutral
|}
[[Category:Biology]][[Category:Chemistry]]
== α-amino acids ==
== α-amino acids ==