I know before the urea cycle begins, an amino acid has to go through a reaction to free up NH3.
In the case of glutamate, does it matter if it is either glutamate or its ionic form, glutamic acid? Different sources are telling me that it is one or the other.
Different sources are also telling me that either CO2 or HCO3- are used in the urea cycle to form carbamoyl phosphate. Is it ok to use both or is it one and not the other?