Exhibit 99.28 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-N KEY PERFORMANCE FACTORS January 31, 2000 Expected B Maturity 11/15/00 Blended Coupon 6.1546% Excess Protection Level 3 Month Average 5.24% January, 2000 5.28% December, 1999 5.15% November, 1999 5.28% Cash Yield 17.79% Investor Charge Offs 4.73% Base Rate 7.79% Over 30 Day Delinquency 5.03% Seller's Interest 9.78% Total Payment Rate 14.21% Total Principal Balance $49,077,414,912.07 Investor Participation Amount $900,000,000.00 Seller Participation Amount $4,800,914,393.58