Amino acid charges depend on side chains in aqueous solution

Steps:

• Identify side chains: alanine (-CH3, neutral), glycine (-H, neutral), aspartate (-CH2COO-, acidic), lysine (-(CH2)4NH3+, basic).
• In water at pH ~7, all amino acids form zwitterions (NH3+ and COO- cancel), but acidic/basic side chains add extra charge.
• Neutral side chains (alanine, glycine) yield overall zero charge.
• Acidic (aspartate) yields -1; basic (lysine) yields +1.

Not enough information: Diagrams not provided, so cannot confirm structures or pH-specific charges.

Final answer: Not enough information.