P
P. vivax MSP1
Posted on July 24, 2011 |
A surface protein found on Plasmodium species which induces a T-cell response. The antigen is polymorphic, sharing amino acid sequence homology among PLASMODIUM FALCIPARUM; PLASMODIUM CHABAUDI; PLASMODIUM VIVAX; and PLASMODIUM YOELII.
P1 Purinoceptor
Posted on July 24, 2011 |
A class of cell surface receptors that prefers adenosine to other endogenous purines. Purinergic P1 receptors are widespread in the body including the cardiovascular, respiratory, immune, and nervous systems. There are at least two pharmacologically distinguishable types (A1 and A2, or Ri and Ra). The methylxanthines, e.g., caffeine, bind to these receptors, but also have other unrelated effects.
P1 Phage
Posted on July 24, 2011 |
A species of temperate bacteriophage in the genus P1-like Viruses, family MYOVIRIDAE which infects E. coli. It is the largest of the coliphages and consists of double-stranded DNA, terminally redundant, and circularly permuted.
P0 Protein
Posted on July 24, 2011 |
A protein that accounts for more than half of the peripheral nervous system myelin protein. The extracellular domain of this protein is believed to engage in adhesive interactions and thus hold the myelin membrane compact. It can behave as a homophilic adhesion molecule through interactions with its extracellular domains. (From J Cell Biol 1994;126(4):1089-97)
P2 Protein
Posted on July 24, 2011 |
A positively charged protein found in peripheral nervous system myelin. Sensitive immunological techniques have demonstrated that P2 is expressed in small amounts of central nervous system myelin sheaths of some species. It is an antigen for experimental allergic neuritis (NEURITIS, EXPERIMENTAL ALLERGIC), the peripheral nervous system counterpart of experimental allergic encephalomyelitis. (From Siegel et al., Basic Neurochemistry, 5th ed, p133)
P2 Phage
Posted on July 24, 2011 |
A species of temperate bacteriophage in the genus P2-like Viruses, family MYOVIRIDAE, which infects E. coli. It consists of linear double-stranded DNA with 19-base sticky ends.
P105-Rb Protein
Posted on July 24, 2011 |
Product of the retinoblastoma tumor suppressor gene. It is a nuclear phosphoprotein hypothesized to normally act as an inhibitor of cell proliferation. Rb protein is absent in retinoblastoma cell lines. It also has been shown to form complexes with the adenovirus E1A protein, the SV40 T antigen, and the human papilloma virus E7 protein.
P27 rex
Posted on July 24, 2011 |
Post-transcriptional regulatory proteins required for the accumulation of mRNAs that encode the gag and env gene products in HUMAN T-LYMPHOTROPIC VIRUS 1 and HUMAN T-LYMPHOTROPIC VIRUS 2. The rex (regulator x; x is undefined) products act by binding to elements in the LTR.
P22 Phage
Posted on July 24, 2011 |
A species of temperate bacteriophage in the genus P22-like Viruses, family PODOVIRIDAE, that infects Salmonella species. The genome consists of double-stranded DNA, terminally redundant, and circularly permuted.
P2 Purinoceptor
Posted on July 24, 2011 |
A class of cell surface receptors for purines that prefer ATP or ADP over adenosine. P2 purinergic receptors are widespread in the periphery and in the central and peripheral nervous system. Subtypes have been proposed, usually designated P2 x, y, z, and t. P2x receptors may mediate fast synaptic transmission by ATP. The ADP-preferring P2t receptors in platelets stimulate aggregation.