Quick question related to amino acid in acidic environments

[monokekie]

for amino acids such as asparagine glutamine and arginine, would you expect both of the NH2 groups in their structure to accept a proton in an acidic environment? or its just one only??

thankss sooo much in advance!

[dekoyl]

Both become -NH3+

[TrueTears]

Same goes for COOH if it is in basic environment, if COOH is part of the Z side chain it would also turn

[monokekie]

ahh alrite ,  thanks so much dekoyl and truetears!