Titratations, acid, base, etc...

[coolchix321]

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During a titration with an amino acid (alanine for example) with a strong base... the COOH is depronated first... which leaves us with a negative charge (anion)... and it is still acidic (low pH)... right?
but I thought that a positive charge on the Nitrogen is what made it acidic... and once more protons were taken off... from the COOH and NH3... then it became basic...
am i missing something here... because this all seems paradoxical...
help please