Exhibit 99.28 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-N KEY PERFORMANCE FACTORS March 31, 2000 Expected B Maturity 11/15/00 Blended Coupon 6.2007% Excess Protection Level 3 Month Average 5.76% March, 2000 5.93% February, 2000 6.06% January, 2000 5.28% Cash Yield 19.42% Investor Charge Offs 4.70% Base Rate 8.79% Over 30 Day Delinquency 4.65% Seller's Interest 8.73% Total Payment Rate 15.20% Total Principal Balance $49,480,326,758.32 Investor Participation Amount $900,000,000.00 Seller Participation Amount $4,321,526,239.83