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A cyclic, non-polar [[amino acid]] used in [[protein]]s.

A positively charged common [[amino acid]], incorporated into [[protein]]s.

{{r|amino acid}} {{r|essential amino acid}}

One of four common [[aromatic]] [[amino acid]]s in [[protein]]s.

One of the common [[amino acid]]s used in [[protein]] synthesis.

A '''peptide''' is a [[molecule]] consisting of two or more [[amino acid]]s. Peptides are smaller than [[protein]]s, with the division between the t

An [[aliphatic]], non-polar, [[hydrophobic]] [[amino acid]]s incorporated into [[protein]]s.

Enzymes that differ in amino acid sequence but catalyze the same chemical reaction.

A positively charged [[amino acid]] used by living systems to build [[proteins]].

One of three hydroxylated [[amino acid]]s used in [[protein]] synthesis; subject to phosphorylation.

...lude>A biochemical messenger and regulator, synthesized from the essential amino acid L-[[tryptophan]].

...lude>A [[heterocycle|heterocyclic]] chemical compound, side chain of the [[amino acid]] [[tryptophan]]

One of two common [[amino acid]]s used in [[protein]]s that contain a [[sulphur]] atom.

Naturally-occurring [[peptide]] and [[amino acid]] derivatives which are used to control the growth of [[cancer]].

One of three hydroxylated [[amino acid]]s in [[protein]]s; it may be [[phosphorylation|phosphorylated]]

A 36-amino acid peptide neurotransmitter found in the CNS and autonomic nervous system.

An essential [[amino acid]] for some animals which carries long chain fatty acids across the inner mi

...ine''', abbreviated as '''Leu''' or '''L''', is one of the twenty common [[amino acid]]s used by living organisms to build [[protein]]s. It is one of the non-po

One of the twenty common [[amino acid]]s used by living organisms to build [[protein]]s.

One of the common [[amino acid]]s incorporated into proteins. It is charged, polar, and hydrophilic.