| Amino Acids, Neutral | Amino acids with uncharged R groups or side chains. | 36 | 188 | Details |
| Amino Acids, Peptides, and Proteins | Amino acids and chains of amino acids connected by peptide linkages. | 1795 | 4028 | Details |
| Amino Acids, Sulfur | Amino acids and chains of amino acids connected by peptide linkages. | 38 | 220 | Details |
| Amino Alcohols | Compounds possessing both a hydroxyl (-OH) and an amino group (-NH2). | 129 | 591 | Details |
| Amino Sugars | SUGARS containing an amino group. GLYCOSYLATION of other compounds with these amino sug... more | 28 | 68 | Details |
| Aminoacridines | Acridines which are substituted in any position by one or more amino groups or substitu... more | 9 | 42 | Details |
| Aminoacyltransferases | Enzymes that catalyze the transfer of an aminoacyl group from donor to acceptor resulti... more | 1 | 2 | Details |
| Aminoalkyl Ethers | Not Available | 9 | 25 | Details |
| Aminobenzoates | Derivatives of BENZOIC ACID that contain one or more amino groups attached to the benze... more | 58 | 233 | Details |
| Aminobutyrates | Derivatives of BUTYRIC ACID that contain one or more amino groups attached to the aliph... more | 19 | 74 | Details |
| Aminocaproates | Amino derivatives of caproic acid. Included under this heading are a broad variety of a... more | 4 | 10 | Details |
| Aminocoumarins | COUMARINS with an amino group, exemplified by NOVOBIOCIN. | 2 | 14 | Details |
| Aminoglycoside Antibacterials | A category of amino glycoside antibacterials. Must have an amino group attached to a gl... more | 36 | 90 | Details |
| Aminohippuric Acids | A group of glycine amides of aminobenzoic acids. | 1 | 12 | Details |
| Aminohydrolases | Not Available | 3 | 5 | Details |
| Aminoketone Antidepressants | Not Available | 1 | 11 | Details |
| Aminolevulinate Synthase 1-directed RNA Interaction | Not Available | 1 | 2 | Details |
| Aminolevulinate Synthase 1-Directed Small Interfering RNAs | RNA interference therapies that inhibit aminolevulinate synthase-1 expression. | 1 | 2 | Details |
| Aminopenicillins | Not Available | 2 | 21 | Details |
| Aminopeptidases, antagonists & inhibitors | Not Available | 1 | 5 | Details |
| Aminophenols | Phenols substituted in any position by an amino group. | 1 | 0 | Details |
| Aminopyridines | Pyridines substituted in any position with an amino group. May be hydrogenated, but mus... more | 13 | 57 | Details |
| Aminopyrine | A pyrazolone with analgesic, anti-inflammatory, and antipyretic properties but has risk... more | 1 | 4 | Details |
| Aminoquinolines | Quinolines substituted in any position by one or more amino groups. | 7 | 64 | Details |
| Aminosalicylate | Not Available | 4 | 52 | Details |