nucleosomas

nucleosomas

The repeating structural units of chromatin, each consisting of approximately 200 base pairs of DNA wound around a protein core. This core is composed of the histones H2A, H2B, H3, and H4.

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antihelmínticos

농업; 일반 농업

Agents destructive to parasitic worms. They are used therapeutically in the treatment of infestation with parasitic worms of the helminth class, in humans and animal.

antígenos de superficie

농업; 일반 농업

Antigens on surfaces of cells, including infectious or foreign cells or viruses. They are usually protein-containing groups on cell membranes or walls.

antígenos de neoplasias

농업; 일반 농업

Proteins, glycoprotein, or lipoprotein moieties on surfaces of tumor cells that are usually identified by monoclonal antibodies. Many of these are of either embryonic or viral ...

antígenos de histocompatibilidad

농업; 일반 농업

A group of antigens that includes both the major and minor histocompatibility antigens. The former are genetically determined by the major histocompatibility complex. They ...

antígeno nuclear de célula proliferativa

농업; 일반 농업

Nuclear antigen with a role in DNA synthesis, DNA repair, and cell cycle progression. PCNA is required for the coordinated synthesis of both leading and lagging strands at the ...

anticonceptivos

농업; 일반 농업

Agents, devices, methods, or procedures which diminish the likelihood of or prevent conception.

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La Mona Lisa

The Mona Lisa is widely recognized as one of the most famous paintings in the history of art. It is a half-length portrait of a seated woman painted ...