Is optically inactive. Can be sep into dextrorotary and levorotatory. Defined as potential inside cell, minus potential outside cell. V in - V out . Responsible for preventing polyspermy in urchin eggs and for information flow in neurons.
Potassium is sequestered inside the cell, while sodium is kept out.
Occurs naturally in some plants, is used as a growth substrate in some tests for bacteria and is sometimes used to maintain the tonicity of low ionic strength media. Usu 75-90 ribonucleotides. Anticodon end recognises complimentary mRNA to unite. The pressure within cells, especially plant cells, derived from osmotic pressure differences between the inside and outside of the cell giving rise to mechanical rigidity of the cells. Final product of protein metabolism.