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Type IV pilus non-core minor pilin PilE-like
Type IV pilus non-core minor pilin PilE-like: low-abundance type IV pilin-family proteins, exemplified by Pseudomonas aeruginosa PilE and Neisseria PilX, PilV, ComP, that modify pilus function without being required for pilus assembly.
Type IV restriction enzyme
Type IV restriction enzymes are modification-dependent endonucleases that cleave DNA because it contains methylated or otherwise modified bases, exemplified by the McrA, McrBC, and Mrr systems of Escherichia coli.
Type IV secretion system protein VirB11
VirB11 (traffic ATPase, HP0525 in Helicobacter pylori) is a hexameric AAA+ ATPase of bacterial type IV secretion systems; with VirB4 and VirD4 it forms the energy center driving substrate secretion and conjugative pilus assembly, acting as a switch between the two.
Type IV secretion system, VirB10/TraB/TrbI
VirB10/TraB/TrbI family: core VirB7-VirB9-VirB10 component of bacterial type IV secretion systems; only known protein spanning both Gram-negative membranes, forms the outer membrane channel and gates it as an ATP energy sensor.
Type IVa pilus alignment subcomplex PilO, C-terminal domain
PilO C-terminal domain: periplasmic globular ferredoxin-like fold core of the T4aP alignment subcomplex protein PilO (PDB 2RJZ, 5UVR); forms homo- and heterodimers with PilN; distinct from P. aeruginosa 1244 PilO glycosyltransferase.
Type IVa pilus alignment subcomplex PilO, N-terminal region
PilO N-terminal region: the cytoplasmic peptide, transmembrane segment, and coiled coil of the PilO alignment subcomplex protein of type IVa pili in Pseudomonas aeruginosa, studied via Δ68 (PDB 2RJZ) and Δ109 crystal structures.
Type IX submarine
The Type IX submarine, also called the Type IX U-boat, was a large German long-range attack submarine used in the Battle of the Atlantic from 1938 to 1945.
Type metal
Type metal is a lead-based alloy of lead, tin, and antimony used for casting movable type and printing plates such as stereotype plates and electrotypes.
Type N enteroendocrine cell
Type N enteroendocrine cell (N cell): a neurotensin-secreting EEC of the jejunum and ileum, identified in 1977, stimulated by dietary fats via FFAR1/FFAR4, coexpressing GLP-1 and PYY, and arising from L-cell lineage switching.
Type O Negative
Type O Negative: Brooklyn gothic/doom metal band formed 1990 from Carnivore's remnants by Peter Steele (died April 2010). Seven studio albums including Bloody Kisses (1993, first Roadrunner gold album) and October Rust (1996); live album due early 2027.
Type rating
A type rating is an endorsement on a pilot certificate qualifying the holder to fly a specific aircraft type, such as the Boeing 737 or Airbus A320.
Type species
Type species: the nominal species serving as the name-bearing type of a genus or subgenus under the ICZN, fixed by original designation, monotypy, or tautonymy, anchoring genus names.
Type specific antigen
TSA56 (56-kDa type-specific antigen) is the major variable surface protein of Orientia tsutsugamushi, the scrub typhus bacterium; unique to Orientia, it defines genotypes, drives strain-specific immunity, and anchors serodiagnosis and vaccine design.
Type synthesis (mechanism design)
Type synthesis is the mechanism design stage that generates and selects a mechanism's structural type, its topology of links and joints, to produce a prescribed motion, preceding dimensional synthesis.
Type system
A type system, also called a typing discipline, is the set of types and rules a programming language uses to assign types to values and expressions, preventing type errors.
Type theory
Type theory, or the theory of logical types, is a formal system where every entity carries a type, serving as a foundation for mathematics and proof assistants like Lean and Rocq.
Type VII submarine
The Type VII was a German U-boat class, built from 1935 to 1945, that formed the backbone of the Kriegsmarine's Battle of the Atlantic force.
Type X submarine
The Type X submarine, of which the Type XB was the only variant built, was a class of eight large minelayer U-boats of the German Kriegsmarine in the Second World War.
Type XXI submarine
The Type XXI U-boat was a German Second World War submarine class, the first designed to operate primarily submerged, with about 119 boats completed but none seeing combat.
Type-2 fuzzy sets
A type-2 fuzzy set is a fuzzy set whose membership grades are themselves fuzzy, representing uncertainty about the membership degree; Lotfi Zadeh introduced them in 1975.
Type-2 singularity
A Type-2 singularity, also called a forward kinematic singularity or force singularity, is a parallel manipulator configuration where the platform gains an uncontrolled degree of freedom.
Type-II band alignment
Type-II band alignment, or staggered alignment, is the heterojunction arrangement where electrons and holes accumulate in separate layers, suppressing recombination in photodetectors, photocatalysts, photovoltaics, and 2D van der Waals devices.
Type-II band alignment in transition-metal dichalcogenide heterostructures
Type-II band alignment in transition-metal dichalcogenide (TMDC) heterostructures places conduction- and valence-band edges in different layers, separating electrons and holes and extending interlayer exciton lifetimes.
Type-II heterojunction
A Type-II heterojunction is a junction of two semiconductors with staggered band edges, separating electrons and holes across the interface; in 2D materials it hosts interlayer excitons.
Type-II multiferroics
Type-II multiferroics, also called magnetically induced multiferroics, are materials in which magnetic spin order breaks inversion symmetry and induces ferroelectric polarization, giving strong magnetoelectric coupling.
Type-II superconductor
A type-II superconductor is a superconducting material with a Ginzburg-Landau parameter above 0.71 that admits quantized vortex flux between two critical fields, used in high-field magnets.
Type-II superlattice infrared detector
A type-II superlattice infrared detector is a photodetector whose absorber is alternating nanometer-thick InAs and GaSb layers, with a tunable band gap for sensing infrared from 3 to 32 μm.
Type-II Weyl semimetals
Type-II Weyl semimetals are materials whose strongly tilted Weyl cones put the Weyl points at the touch of open electron and hole pockets, first predicted in WTe₂ in 2015.
Type-Moon
Type-Moon (TYPE-MOON), Japanese visual novel company founded 2000 by Kinoko Nasu and Takashi Takeuchi; creator of Tsukihime and Fate/stay night, now known for Fate/Grand Order and Fate/EXTRA Record.
Typecasting
Typecasting: repeated casting of an actor in roles matching a fixed character type, also called playing against type when broken. Studied by Zuckerman et al. (AJS 2003) and Friedman & O'Brien (2017) as a labor-market mechanism.