Exhibit 99.28 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-N KEY PERFORMANCE FACTORS May 31, 2000 Expected B Maturity 11/15/00 Blended Coupon 6.8151% Excess Protection Level 3 Month Average 5.70% May, 2000 5.55% April, 2000 5.63% March, 2000 5.93% Cash Yield 19.29% Investor Charge Offs 4.66% Base Rate 9.08% Over 30 Day Delinquency 4.70% Seller's Interest 9.50% Total Payment Rate 14.38% Total Principal Balance $52,496,626,963.52 Investor Participation Amount $900,000,000.00 Seller Participation Amount $4,987,826,445.03