The lipid bilayer surrounding an exocytic vesicle.

The developmental process pertaining to the initial formation of a pronephric nephron tubule from unspecified parts. A pronephric nephron tubule is an epithelial tube that is part of a nephron in the pronephros.

The developmental process pertaining to the initial formation of a nephron tubule from unspecified parts. A nephron tubule is an epithelial tube that is part of the nephron, the functional part of the kidney.

The portion of the plasma membrane surrounding an axon; it is a specialized trilaminar random mosaic of protein molecules floating within a fluid matrix of highly mobile phospholipid molecules, 7-8 nm in thickness.

The process in which the anatomical structures of the pronephric nephron are generated and organized. A pronephric nephron is the functional unit of the pronephros.

The process in which the anatomical structures of the nephron are generated and organized. A nephron is the functional unit of the kidney.

The process in which the anatomical structures of a pronephric nephron tubule are generated and organized from an epithelium. A pronephric nephron tubule is an epithelial tube that is part of the pronephric nephron.

The process in which the anatomical structures of a nephron tubule are generated and organized. A nephron tubule is an epithelial tube that is part of the nephron, the functional part of the kidney.

OBSOLETE. A cytochrome b-like protein that has a sulfur atom ligated to the iron of the prosthetic group (heme-thiolate); enzymes: typically monooxygenases acting on, typically, lipophilic substrates. The characteristic mode of action of these enzymes is not electron transfer (some P450 enzymes probably do not even involve the reversible Fe(II)/Fe(III) equilibrium), but rather oxygen atom transfer.

OBSOLETE. The incorporation of hemolymph proteins by cells of the fat body of holometabolous insects, during the final larval stage. Uptake of these proteins prepares the insect for pupation and metamorphosis, since insect pupae do not feed and therefore depend on material that has been accumulated during larval life.

The process in which regions of the embryo are delineated into the area in which the pronephric kidney will develop.

The process that results in the delineation of regions of the embryo into the area in which the kidney rudiment will develop.

The process in which the proximal tubule of the pronephric nephron acquires its identity.

The process in which the proximal tubule of the kidney nephron acquires its identity.

The regionalization process in which specific areas of cell differentiation are determined along a proximal/distal axis of the pronephros.

A class of nuclear body, first seen after silver staining by Ramon y Cajal in 1903, enriched in small nuclear ribonucleoproteins, and certain general RNA polymerase II transcription factors; ultrastructurally, they appear as a tangle of coiled, electron-dense threads roughly 0.5 micrometers in diameter; involved in aspects of snRNP biogenesis; the protein coilin serves as a marker for Cajal bodies. Some argue that Cajal bodies are the sites for preassembly of transcriptosomes, unitary particles involved in transcription and processing of RNA.