As you know, sperm cells look a bit like tadpoles with long tails, orflagella, which they whip in order to swim to their destination and fertilize an egg cell. The sperm tail is made of tubulin and is an example of a microtubule filament used for cell locomotion. Another well-known moti...
In sea urchin sperm, the binding of the chemoattractant speract to its extracellular receptor enhances intracellular cGMP production, CNGK channel opening and the hyperpolarization-induced activation of SLC9C12,3,5,8. The diagram was created using BioRender.com. b, The NHE transporter module has ...
The egg cell from the mother is large and contains a lot of mitochondria in its cytosol while the fertilizing sperm cell from the father has hardly any. As a result, children inherit their mitochondria and their mitochondrial DNA from their mother. Through their ATP synthesis function in the m...
Chromosome structure refers to the arrangement of DNA double-helix backbone in a chromosome, where it extends uninterrupted from one end to the other, including the centromere. In the cell cycle, the chromosome duplicates and consists of two identical chromatids in the G2 stage. A break in the...
Cleavage of transfer (t)RNA and ribosomal (r)RNA are critical and conserved steps of translational control for cells to overcome varied environmental stresses. However, enzymes that are responsible for this event have not been fully identified in high eu
All domain positions were obtained using SwissProt using the accession number Q15141. Not to scale. 3. Leucine-rich repeats Two complete B-type leucine-rich repeats (LRRs) are encoded by PKD1 exons 2 and 3 [1], [4], [12]. LRRs are characterised by the occurrence of a 24 amino acid...
Most density gradient procedures used to prepare lysosomes are modifications of the technique developed by W. C. Schneider (Fig. 19-1). Using this technique, most of the mitochondria are banded isopycnically at a density of about 1.19 g/cm3, whereas most of the lysosomes...
Some of the emotions associated with different reinforcement contingencies are indicated. Intensity increases away from the centre of the diagram, on a continuous scale. The classification scheme created by the different reinforcement contingencies consists with respect to the action of (1) the delivery...
Using meta-genomic data (GREMLIN) and Rosetta modeling programs, a structural model of the transmembrane (TM) regions in CcsBA were determined. The heme mapping data were then incorporated to model the TM heme binding site (with TM-His1 and TM-His2 as ligands) and the external heme ...
It helps in the formation of amino acids. In the matrix of the mitochondria, several fatty acids can be synthesized. During the process of oogenesis, they help in the formation of the yolk. During the process of spermatogenesis, they help in the formation of the middle part of the sperms...