| Photoactive yellow protein | Halorhodospira halophila | Photoactive blue light protein. Probably functions as a photoreceptor for a negative phototaxis response. | 3 | Details |
| Photoactive yellow protein | Rhodospirillum centenum | Not Available | 1 | Details |
| Photosynthetic reaction center cytochrome c subunit | Rhodopseudomonas viridis | The reaction center of purple bacteria contains a tightly bound cytochrome molecule which re-reduces the photo oxidiz... more | 8 | Details |
| Photosystem II extrinsic protein V | Synechocystis sp. (strain PCC 6803 / Kazusa) | One of the extrinsic, lumenal subunits of photosystem II (PSII). PSII is a light-driven water plastoquinone oxidoredu... more | 1 | Details |
| Photosystem II protein D1 1 | Thermosynechococcus elongatus (strain BP-1) | Photosystem II (PSII) is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electro... more | 2 | Details |
| Phytanoyl-CoA dioxygenase, peroxisomal | Humans | Catalyzes the 2-hydroxylation of not only racemic phytanoyl-CoA and the isomers of 3-methylhexadecanoyl-CoA, but also... more | 4 | Details |
| PhzG | Pseudomonas aeruginosa | Not Available | 1 | Details |
| PI-PLC X domain-containing protein 3 | Humans | Not Available | 1 | Details |
| Piezo-type mechanosensitive ion channel component 1 | Humans | Pore-forming subunit of the mechanosensitive non-specific cation Piezo channel required for rapidly adapting mechanic... more | 2 | Details |
| Pigment epithelium-derived factor | Humans | Neurotrophic protein; induces extensive neuronal differentiation in retinoblastoma cells. Potent inhibitor of angioge... more | 1 | Details |
| Pikromycin polyketide synthase component PikAIV | Streptomyces venezuelae | Involved in the biosynthesis of 12- and 14-membered ring macrolactone antibiotics such as methymycin and neomethymyci... more | 3 | Details |
| Pimeloyl-[acyl-carrier protein] methyl ester esterase | Escherichia coli (strain K12) | The physiological role of BioH is to remove the methyl group introduced by BioC when the pimeloyl moiety is complete.... more | 2 | Details |
| Pituitary adenylate cyclase-activating polypeptide | Humans | PACAP is a neuropeptide involved in diverse array of physiological processes through activating the PACAP subfamily o... more | 1 | Details |
| Placenta growth factor | Humans | Growth factor active in angiogenesis and endothelial cell growth, stimulating their proliferation and migration. It b... more | 3 | Details |
| Plasma kallikrein | Humans | Participates in the surface-dependent activation of blood coagulation. Activates, in a reciprocal reaction, coagulati... more | 15 | Details |
| Plasma membrane ascorbate-dependent reductase CYBRD1 | Humans | Plasma membrane reductase that uses cytoplasmic ascorbate as an electron donor to reduce extracellular Fe(3+) into Fe... more | 2 | Details |
| Plasma membrane calcium-transporting ATPase | Humans | Group containing the human plasma membrane calcium-transporting ATPase protein subtypes. | 2 | Details |
| Plasma protease C1 inhibitor | Humans | Serine protease inhibitor, which acrs as a regulator of the classical complement pathway. Forms a proteolytically ina... more | 4 | Details |
| Plasma serine protease inhibitor | Humans | Heparin-dependent serine protease inhibitor acting in body fluids and secretions. Inactivates serine proteases by bin... more | 5 | Details |
| Plasmepsin I | Plasmodium falciparum (isolate 3D7) | During the asexual blood stage, catalyzes the initial cleavage of native host hemoglobin (Hb) resulting in Hb denatur... more | 1 | Details |
| Plasmepsin II | Plasmodium falciparum | During the asexual blood stage, participates in initial cleavage of native host hemoglobin (Hb) resulting in Hb denat... more | 8 | Details |
| Plasmepsin III | Plasmodium falciparum (isolate 3D7) | During the asexual blood stage, catalyzes the cleavage of denatured host hemoglobin (Hb) or globins. Digestion of hos... more | 1 | Details |
| Plasmepsin IV | Plasmodium falciparum (isolate 3D7) | During the asexual blood stage, catalyzes the cleavage of denatured host hemoglobin (Hb). Digestion of host Hb is an ... more | 1 | Details |
| Plasmepsin X | Plasmodium falciparum (isolate NF54) | During the asexual blood stage, processes key proteins essential for merozoite egress and invasion of host erythrocyt... more | 1 | Details |
| Plasmepsin X | Plasmodium falciparum (isolate 3D7) | During the asexual blood stage, processes key proteins essential for merozoite egress and invasion of host erythrocyt... more | 1 | Details |