Ni awon eranko to n gbe inu ile, o wa lagbede meji ni iyo nitrogen kuro ninu ara latari Iyipo urea iseto pyrimidines.Iseto re Won maa n seto re lati inu bicarbonate, ammonia (ti a yo kuro ninu glutamine), ati phosphate (lati ATP).. 
George Robert '"Bob NewHartley (September 5, 1929) jẹ́ òṣèré ará Amẹ́ríkà.Àwọn ìtọ́kasíàwọn òṣèré fíú ará Amẹ́ríkà.. 