Plant species produce lectins, defensive proteins that bind to carbohydrates or carbohydrate-containing proteins.

TLS Online TPP Program

#Id: 2347

#Unit 3. Fundamental Processes

Sigma seems to stimulate both initiation and elongation.

TLS Online TPP Program

#Id: 7613

#Unit 5. Developmental Biology

Acrosomal enzymes (acrosin and MMP2) as well as the enzymes that help establish capacitation, are inhibited by zinc, the accumulation of zinc on the zona pellucida and in the surrounding cumulus form a “zinc shield” that prevents further sperm entry

TLS Online TPP Program

#Id: 9268

#Unit 6. System Physiology – Plant

Nitrogenase is a complex consisting of the MoFe protein (dinitrogenase or component I) a heterotetramer, and the Fe protein (dinitrogenase reductase or component II) a homodimer.

TLS Online TPP Program

#Id: 6566

#Unit 7. System Physiology – Animal

Glucagon receptors located on the same hepatic cells to activate phospholipase C, and the resulting increase in cytoplasmic Ca2+ also stimulates glycogenolysis

TLS Online TPP Program

#Id: 1058

#Unit 5. Developmental Biology

The genes encoding Islet1, Tbx4, and Pitx1 are expressed in presumptive hindlimbs.