Organic compounds that contain both amino and carboxyl groups, serving as the fundamental building blocks of proteins.

(bound form) amino; an amino group consisting of one nitrogen atom and two hydrogen atoms

An amino acid that plays an important role in protein metabolism; its sodium salt is used to make [[味精|味精|wei4 jing1]]

lysine (Lys); an essential amino acid necessary for human health

tyrosine (Tyr), a non-essential amino acid used in the biosynthesis of proteins

arginine (Arg), an amino acid

a solution of ammonia gas in water, characterized by its strong, pungent odor; used in industry as a nitrogen fertilizer, cleaning agent, or for first aid medical treatment

alanine, a common amino acid found in proteins

proline, a type of amino acid

Glycine (Gly), an amino acid; the simplest amino acid with the smallest molecular weight, often appearing as a white crystal with a sweet taste.

tryptophan (Trp), an essential amino acid

serine, an amino acid

An enzyme that catalyzes the transfer of an amino group from an amino acid to a keto acid; it is found in the cells of the heart, liver, and kidneys.

an essential amino acid

threonine (Thr), an essential amino acid

histidine (His), an essential amino acid

valine; an essential amino acid

A colorless, pungent gas composed of nitrogen and hydrogen; commonly used in fertilizers, explosives, and as a refrigerant. Also known as [[阿摩尼亚|阿摩尼亞|a1 mo2 ni2 ya4]] or [[安摩尼亚|安摩尼亞|an1 mo2 ni2 ya4]].

the process of organic amines decomposing through biochemical reactions to release ammonia

(bound form) ethylamino group, a chemical group derived from ethylamine

an amino acid containing sulfur; mercaptoethyl amine

aspartic acid (Asp); an amino acid; also known as aspartate

acetaminophen; common over-the-counter pain reliever and fever reducer

isoleucine (Ile), an essential amino acid

albuterol, also known as salbutamol; a medication used to treat asthma and other breathing conditions

aminoacridine or aminacrine; used as an antiseptic and disinfectant

clenbuterol; a chemical compound used primarily as a bronchodilator for respiratory issues and in some cases for performance enhancement

aminoacetic acid, an amino acid that is a major constituent of many proteins and acts as a neurotransmitter

analgesic and antipyretic drug commonly used for pain relief and fever reduction

aminopyrine; a crystalline compound used as a powerful fever-reducer and painkiller, now largely banned in many countries due to severe side effects

carbamate; any of a class of organic compounds derived from carbamic acid

glucosamine (C6H13NO5)

spandex; elastane; a synthetic fiber known for its exceptional elasticity

ampicillin; penbritin

a chemical compound used as a fertilizer and in industrial processes

methylamino group; a chemical group consisting of a methyl group attached to an amino group

methionine, an essential amino acid

neuraminidase; an enzyme on the surface of viruses such as influenza that helps them spread

A chain of amino acids linked by peptide bonds, a component of protein

a compound consisting of two or more amino acids linked by bonds between the carboxyl group of one and the amino group of another

phenylalanine (Phe), an essential amino acid

methionine, an essential amino acid

glutamine; an amino acid often abbreviated as Gln