Single-Cell Peptide Profiling to Distinguish Stickleback Ecotypes with Divergent Breeding Behavior.

Variation in parenting behavior is widespread across the animal kingdom, both within and between species. There are two ecotypes of the three-spined stickleback fish () that exhibit dramatic differences in their paternal behavior. Males of the common ecotype are highly attentive fathers, tending to young from eggs to fry, while males of the white ecotype desert offspring as eggs.

alkyl quinolone response is dampened by .

Unlabelled: The bacterium is an opportunistic pathogen that can cause lung, skin, wound, joint, urinary tract, and eye infections. While is known to exhibit a robust competitive response toward other bacterial species, this bacterium is frequently identified in polymicrobial infections where multiple species survive. For example, in prosthetic joint infections, can be identified along with other pathogenic bacteria including , , and .

Neurochemical and Morphological Comparisons of Motor Nerve Organoids and Spinal-Cord Explants.

Organoids are multicellular structures formed from populations of individual cells allowing modeling of structural and functional aspects of organs and tissues in normal and diseased states. They offer unique opportunities to model and treat disease. Using a mouse embryonic stem cell line, we have cultured organoids that express markers of spinal cord motor neurons as well as motor neurons found within the peripheral nervous system.

Recent Advancements in the Characterization of D-Amino Acid and Isoaspartate Post-Translational Modifications.

One of the great triumphs of mass spectrometry-based peptide and protein characterization is the characterization of their modifications as most modifications have a characteristic mass shift. What happens when the modification does not change the mass of the peptide? Here, the characterization of several peptide and proteins modifications that do not involve a mass shift are highlighted. Protein and peptide synthesis on ribosomes involves L-amino acids; however, posttranslational modifications (PTMs) can convert these L-amino acids into their D-isomers.