Any process that modulates the frequency, rate or extent of the passage or uptake of molecules by the lysosomal membrane.

Any process that modulates the frequency, rate or extent of the passage or uptake of molecules by a membrane.

Any process that increases the frequency, rate or extent of the passage or uptake of molecules by the lysosomal membrane.

Any process that activates or increases the frequency, rate or extent of the passage or uptake of molecules by a membrane.

Any process that decreases the frequency, rate or extent of the passage or uptake of molecules by the lysosomal membrane.

Any process that stops, prevents or reduces the frequency, rate or extent of the passage or uptake of molecules by a membrane.

Binding to guanosine tetraphosphate (5'-ppGpp-3'), a guanosine bisphosphate having diphosphate groups at both the 3' and 5'-positions.

A pit-like area in the cell wall of a sieve element; contains pores lined with callose and occupied by strands of protoplasmic material that interconnect the protoplasts of contiguous sieve elements.

A part of the cell wall of a sieve tube member that bears one or more highly specialized sieve areas.

A sieve plate that contains several specialized sieve areas in either a scalariform or reticulate arrangement.

A sieve plate that contains a single specialized sieve area.

A protein complex that contains a MADS-box protein and two forkhead domain proteins, and binds to and regulates transcription from promoters of genes transcribed during the M/G1 transition of the cell cycle. In Schizosaccharomyces pombe, the complex contains the MADS-box protein Mbx1 and two forkhead proteins, Sep1 and Fkh2.

The enzymatic addition of a sequence of 40-60 adenylyl residues at the 3' end of a eukaryotic mitochondrial mRNA primary transcript. Mitochondria contain both stabilizing and destabilizing poly(A) tails.

Any process involved in forming the mature 3' end of an mRNA molecule that derives from the mitochondrial genome.

The enzymatic addition of a sequence of 40-200 adenylyl residues at the 3' end of a eukaryotic mRNA primary transcript.

OBSOLETE. Any constituent part of a sperm, a mature male germ cell that develops from a spermatid.

The segment of the sperm flagellum that attaches to the implantation fossa of the nucleus in the sperm head; from the remnant of the centriole at this point, the axoneme extends throughout the length of the flagellum.

The highly organized segment of the sperm flagellum which begins at the connecting piece and is characterized by the presence of 9 outer dense fibers (ODFs) that lie outside each of the 9 outer axonemal microtubule doublets and by a sheath of mitochondria that encloses the ODFs and the axoneme; the midpiece terminates about one-fourth of the way down the sperm flagellum at the annulus, which marks the beginning of the principal piece.

The tightly packed helical sheath of ATP-producing mitochondria restricted to the midpiece of the sperm flagellum.

The ring-like, filamentous structure located at the distal end of the midpiece of the sperm flagellum; the annulus is thought to form a diffusion barrier between the midpiece and the principal piece and serve as a stabilizing structure for tail rigidity.