calcium Maksud & Definisi

Contoh calcium

• Redundant mechanisms of calcium-induced calcium release underlying calcium waves during fertilization of sea urchin eggs.

• In the present work we wanted to verify whether oocytes recovered from preantral follicles were able to acquire calcium activity during follicle culture.

• It is uncertain, however, how a high concentration of calcium in the absence of lactate inhibits capacitation.

• Our results suggest that these metabolites are involved in diverse signalling pathways such as calcium release and cell cycle signalling.

• The calcium injection diminished the nonsaturating receptor potentials by about 70%, and in the ten cells tested, response amplitude was reduced 50 -80%.

• These include a regenerative sodium current, the potassium inward rectifier, potassium delayed rectifier and transient outward potassium current, and several calcium currents.

• In the present work we determined whether preantral follicle development in vitro also allows oocytes to acquire calcium signalling activity.

• Local perinuclear calcium signals associated with mitosis entry in early sea urchin embryos.