All articles starting with P

PJT Partners

PJT Partners is a global advisory-focused investment bank in New York City, created in 2015 from the Blackstone spin-off and led by Paul J. Taubman.

PK (पीके) is a 2014 Hindi satirical comedy-drama directed by Rajkumar Hirani, starring Aamir Khan as a stranded alien and Anushka Sharma; top-grossing Bollywood film of 2014 at INR 3.39 billion gross.

PK 11195

PK 11195 is an isoquinoline carboxamide ligand for the translocator protein (TSPO), synthesized in 1983; radiolabeled with carbon-11, it became the first PET tracer for imaging TSPO in humans.

PK machine gun

The PK machine gun (Пулемёт Калашникова) is a Soviet 7.62×54mmR general-purpose machine gun designed by Mikhail Kalashnikov, adopted in 1961 with the lighter PKM following in 1969.

PK Porthcurno

PK Porthcurno, the Porthcurno Telegraph Museum, is a museum in Cornwall housed in the buildings and wartime tunnels of what was once the largest telegraph station in the British Empire.

PK-1

PK-1 (PK1, CVCL_4717) is a human pancreatic ductal adenocarcinoma cell line established in 1984 from a liver metastasis; male donor, Japanese origin, KRAS G12D, TP53 mutant, held as RCB1972/TKG 0239. Distinct from KP-1N and LLC-PK1.

Oct 20, 2026

PK-15

PK-15 (CVCL_2160, ATCC CCL-33) is a spontaneously immortalized porcine kidney epithelial cell line cloned in 1957 from PK-2a, used widely for swine virus research, vaccine production, and PERV-inactivation studies; it is aneuploid and carries PCV1 and endogenous C-type retrovirus.

Oct 22, 2026

PK-4

PK-4 (Plasmakristall-4) is a microgravity complex plasma laboratory on the International Space Station since 2014, a joint European Space Agency and Roscosmos project using trapped charged microparticles to study condensed-matter physics at the single-particle level.

PKA activation

PKA activation: cAMP binding releases the catalytic subunits of protein kinase A, a tetrameric serine/threonine kinase, enabling phosphorylation of over 380 substrates; EPAC mediates parallel PKA-independent cAMP signaling.

PKCS 12

PKCS 12 (Personal Information Exchange Syntax), also known as PFX, is a standard file format that bundles private keys, certificates, and secrets into one password-protected container.

PKHD1

PKHD1 (fibrocystin/polyductin gene, also FCYT, TIGM1) is a large 86-exon gene on 6p12.3-p12.2 encoding a single-pass ciliary receptor protein; biallelic loss-of-function variants cause autosomal recessive polycystic kidney disease, incidence about 1 in 20,000.

Sep 19, 2026

Pkidha

Pkidha, also rendered Peqida, is the first Christian bishop of Adiabene, east of the Tigris, recorded only in the disputed Chronicle of Arbela, with an episcopate dated 104–114 AD.

Oct 10, 2026

PKO Bank Polski

PKO Bank Polski is Poland's largest bank by assets, a state-controlled commercial bank founded in 1919 as a postal savings institution and listed in Warsaw since 2004.

PKP class EU07

The PKP class EU07 is a Polish four-axle universal electric locomotive built under English Electric license at Pafawag and H. Cegielski from 1965 to 1992.

PKP Intercity

PKP Intercity is the national long-distance passenger rail operator of Poland, part of the state-owned PKP Group, running commercial Express InterCity and EuroNight trains and carrying 89 million passengers in 2025.

PKS 1510-089

PKS 1510-089 is a flat-spectrum radio quasar, a blazar whose jet points almost at Earth, about 6 billion light-years away and known for dramatic variability.

PKS 2155-304

PKS 2155-304 is a bright high-frequency-peaked BL Lac object at redshift 0.116, detected at TeV energies by H.E.S.S. and famous for its extreme 2006 gamma-ray outburst.

PKU-Alignment (SafeRLHF and BeaverTails)

PKU-Alignment is Peking University's open safety-alignment research program, known for the Safe RLHF method and the BeaverTails dataset, which separately ranks responses for helpfulness and harmlessness.

PL 2338 (Brazil)

PL 2338, the Marco Legal da Inteligência Artificial, is a Brazilian bill authored by Senate President Rodrigo Pacheco, regulating artificial intelligence through a risk-based model.

PL-01

The PL-01 was a Polish stealth-styled direct fire support vehicle concept developed by OBRUM with BAE Systems, unveiled as a mock-up in 2013 and abandoned without a prototype by 2015.

PL-12 (霹雳-12)

The PL-12 (霹雳-12), exported as the SD-10, is a Chinese active radar-guided air-to-air missile developed in 1993 as China's AMRAAM equivalent and fielded from the mid-2000s.

PL-15 (霹雳-15)

The PL-15 (霹雳-15, CH-AA-10 Abaddon) is a Chinese long-range air-to-air missile developed for the PLAAF, with a range of about 200 km and service from the late 2010s.

PL-21

PL-21 (PL21, CVCL_2161) is a human acute promyelocytic leukemia cell line established in 1981 from peripheral blood, peroxidase-positive, lacking t(15;17), with FLT3-ITD, KRAS and TP53 mutations.

PL/I

PL/I (Programming Language One) is a general-purpose programming language designed by IBM and SHARE in 1963–1964 for commercial, scientific, and systems programming, still used on mainframes.

PL/SQL

PL/SQL (Procedural Language/Structured Query Language) is Oracle's procedural extension to SQL, released in 1991, letting developers declare variables, control program flow, and trap runtime errors.

PL28 ulvan lyase

PL28 ulvan lyase, CAZy polysaccharide lyase family 28; representative NLR48 from Nonlabens ulvanivorans; β-jelly roll fold, 1.9 Å structure, Lys162/Tyr281 catalysis, cleaves ulvan next to both GlcA and IdoA.

PLA Navy landing barges

PLA Navy landing barges, known informally as the Shuiqiao class, are Chinese jack-up barges that link with extendable bridges into a movable pier for landing heavy vehicles on beaches.

PLA2G2A

PLA2G2A (phospholipase A2 group IIA, sPLA2-IIA, hGIIA) is a human gene at 1p36.13 encoding a secreted, calcium-dependent enzyme that hydrolyzes sn-2 phospholipid ester bonds, kills bacteria, and amplifies inflammation.

PLA2G6

PLA2G6 (PNPLA9, iPLA2β, PARK14) is a chromosome 22q13.1 gene encoding calcium-independent phospholipase A2; biallelic mutations cause PLAN, spanning infantile neuroaxonal dystrophy to adult-onset parkinsonism.