The major Chlamydomonas reinhardi y-1 chloroplast membrane polypeptides-I + II, IV, V(a + b)-have been isolated by use of preparative sodium dodecyl sulfate-gel electrophoresis.Rabbit antisera prepared against these polypeptides interact with intact membranes as well as membrane fractions containing these specific antigens. Antisera against polypeptides I + II partially inactivate photosystem I...

Rye Primary Leaf, Phenylalanine Ammonia-Lyase Inhibitor, 2-Aminoindan-2-phosphonic Acid, Photosystem II Damage, Ultraviolet-B In the epidermal layers of rye primary leaves two flavone glycosides and several hydroxycinnamoyl esters are localized, whereas the mesophyll contains two flavone glucuronides and two anthocyanins. The concentrations of all these potential UV-B protective phenylpropanoid...

Overview of the rich and diverse contributions quantum chemistry to understanding structure function biological archetypes for solar fuel research, photosystem II hydrogenases.

Tropical seagrasses are at their highest risk of exposure to photosystem II (PSII) herbicides when elevated rainfall and runoff from farms transports these toxicants into coastal habitats during summer, coinciding with periods of elevated temperature. PSII herbicides, such as diuron, can increase the sensitivity of corals to thermal stress, but little is known of the potential for herbicides to...

Proteolytic mapping of the D 1 subunit of photosystem two and a degradation product which arises during its rapid catabolism shows that the latter is a result of proteolysis within the peptide motif QEEET. This motif is located in a portion of the D 1 protein thought to form a stroma-exposed connection between fourth and fifth transmembrane segments. This connection domain also contains a "PEST...