| Abbreviations | Meaning |
 | ARP | Assimilation Regulatory Protein |
 | ARP | Apolipoprotein Regulatory Protein |
 | ASDB | Active Substance Database; Annotation And Similarity [protein] Database |
 | ASGP | Asialoglycoprotein |
 | ASGR | Asialoglycoprotein Receptor |
 | ASIP | Atypical Protein Kinase C Isotype-specific Interacting Protein |
 | ATM | Asynchronous Transfer Mode; Asynchronous Transfer Protocol; Ataxia-telangiectasia-mutated [protein]; Atmosphere; Average Time Of Maintenance |
 | ATR | Ataxia-telangiectasia And Rad3-related [protein] |
 | AUP | Australian Antigen Protein |
 | AVP | Antiviral Protein |
 | AYP | Autolyzed Yeast Protein |
 | AZGP | Zinc-alpha-2-glycoprotein |
 | B-LPH | Beta-lipoprotein Hormone |
 | BAPP | Beta Amyloid Precursor Protein |
 | BCCP | Biotin Carboxyl Carrier Protein |
 | BCFP | Breast Cyst Fluid Protein |
 | BIP | Bacterial Intravenous Protein |
 | BIP | Binding Protein |
 | BIRP | BIR-containing Proteins |
 | BJ | Bence Jones (proteinuria) |
 | BJ | Bence Jones [protein, Proteinuria]; Biceps Jerk; Bielschowsky-Jansky [syndrome]; Bones And Joints |
 | BJP | Bence Jones Protein Or Proteinuria |
 | BLP | Beta-lipoprotein |
 | BMP | Bitmap; Bone Morphogenetic Protein |
 | BMP | Bone Morphogenetic Protein |
 | BMPI | Bronchial Mucous Proteinase Inhibitor |
 | BP | Basic Protein |
 | BP | Beta-protein |
 | BP | Binding Protein |
 | BPI | Bactericidal Permeability Increasing Protein |
 | BPI | Bactericidal/permeability Increasing [protein] |
 | BPM | Body Protein Monitor |
 | BPS | Brain Protein Solvent |
 | BRAT | A Fusion Protein Between The Membrane Protein Bacteriorhodopsin (BR) And The Catalytic Subunit Of Aspartyl Transcarbamylase From Escherichia Coli |
 | BSCP | Bovine Spinal Cord Protein |
 | BSP | Bone Sialoprotein; Bromosulphthalein |
 | C | Capsid Protein |
 | C1-9 | Complement Proteins 1 To 9 |
 | C4BP | Complement 4 Binding Protein |
 | CA | Capsid Protein |
 | CAAX [BOX] | Protein Segment In Which C Is Cysteine, A Is Usually But Not Always An Aliphatic Amino Acid, And X Is Methionine Or Serine |
 | CABP | Calcium-binding Protein |
 | CAK | Cyclic Adenosine Monophosphate [cAMP] Dependent Protein Kinase |
 | CAMK | Calmodulin-dependent Protein Kinase |
 | CAMPASS | Cambridge Database On Protein Alignments Organized As Structural Superfamilies |
 | CAP | Cell Attachment Protein |
 | CAP | Catabolite Gene Activator Protein |
 | CAP | Cationic Antimicrobial Protein; Circumference Of Apex |
 | CASPR | Contactin-associated Protein |
 | CBP | Calcium-binding Protein |