Updated Exhibit A Ginnie Mae REMIC Trust 2007-012 Characteristics of the Ginnie Mae Multifamily Certificates and the Related Mortgage Loans* Pool Number FHA Program City State Principal Balance as of the Cut-off Date Mortgage Interest Rate (%) Certificate Rate (%) Servicing and Guaranty Fee Rate (%) Maturity Date Monthly Principal and Interest Original Term to Maturity (mos.) Remaining Term to Maturity (mos.) Period from Issuance (mos.) Issue Date Lockout End Date Prepayment Penalty End Date Prepayment Penalty Code Lockout/ Remaining Lockout Period Total Remaining Lockout and Prepayment Penalty Period (mos.) 601456 221(d)(4) Pittsburgh PA $14,926,661.70 5.125% 4.875% 0.250% Jun-45 $74,405.92 463 456 7 Nov-06 N/A Sep-14 12 N/A 87 659877 232/223(f) Peoria IL 12,359,473.38 5.250 5.000 0.250 Dec-41 64,487.74 419 414 5 Jan-07 Jan-08 Jan-17 2 7 115 659894 207/223(f) Kalamazoo MI 11,346,281.62 6.125 5.875 0.250 Jan-42 65,877.50 420 415 5 Jan-07 Jan-09 Jan-17 3 19 115 659905 207/223(f) New Haven CT 10,641,159.57 5.850 5.600 0.250 Jan-42 ** 419 415 4 Feb-07 Jan-08 Jan-17 2 7 115 659906 207/223(f) New Haven CT 10,364,527.84 5.850 5.600 0.250 Jan-42 ** 419 415 4 Feb-07 Jan-08 Jan-17 2 7 115 578216 221(d)(4) Houston TX 9,089,176.05 6.300 6.050 0.250 Jul-44 53,216.47 479 445 34 Aug-04 Jul-09 Jul-14 4 25 85 659879 232/223(f) Smithfield NC 8,170,803.28 5.780 5.530 0.250 Dec-41 45,592.62 420 414 6 Dec-06 Dec-08 Dec-16 3 18 114 608890 220 Manchester NH 7,920,590.09 6.400 6.150 0.250 Feb-46 46,154.59 477 464 13 May-06 Jan-11 Jan-16 14 43 103 618157 221(d)(4) Jersey Village TX 6,964,891.11 5.750 5.500 0.250 Jun-46 37,362.15 473 468 5 Jan-07 Nov-07 Nov-16 2 5 113 639902 223(a)(7) Boston MA 6,940,337.75 5.800 5.550 0.250 Oct-36 41,057.51 359 352 7 Nov-06 N/A Nov-11 14 N/A 53 639908 223(f) Charleston WV 6,850,361.93 6.000 5.750 0.250 Nov-41 39,255.85 419 413 6 Dec-06 Dec-07 Dec-16 2 6 114 612595 221(d)(4) North Logan UT 6,719,865.67 5.980 5.730 0.250 Dec-45 37,223.05 469 462 7 Nov-06 Dec-07 Dec-15 3 6 102 659883 207/223(f) Madison Heights MI 6,712,865.52 6.125 5.875 0.250 Dec-41 39,002.86 420 414 6 Dec-06 Dec-08 Dec-16 3 18 114 652126 232/223(f) Chico CA 6,307,541.86 5.750 5.500 0.250 Jan-42 35,043.79 421 415 6 Dec-06 Feb-09 Feb-17 3 20 116 659893 207/223(f) Chicago IL 5,989,240.78 5.750 5.500 0.250 Jan-42 33,275.35 421 415 6 Dec-06 Feb-09 Feb-17 3 20 116 655025 232/223(f) Prosser WA 5,839,630.66 5.770 5.520 0.250 Oct-41 32,596.17 418 412 6 Dec-06 Oct-08 Oct-16 3 16 112 659892 207/223(f) Barrington IL 5,468,402.53 5.750 5.500 0.250 Jan-42 30,381.66 421 415 6 Dec-06 Feb-09 Feb-17 3 20 116 631788 221(d)(4) Milwaukee WI 5,324,445.79 5.240 4.990 0.250 Nov-45 26,852.93 466 461 5 Jan-07 Nov-07 Nov-15 3 5 101 655026 232/223(f) Hermiston OR 5,259,743.44 5.770 5.520 0.250 Oct-41 29,359.30 418 412 6 Dec-06 Oct-08 Oct-16 3 16 112 659884 223(f)/223(a)(7) Lynchburg VA 5,233,327.44 5.350 5.100 0.250 Dec-41 27,728.43 419 414 5 Jan-07 Dec-08 Dec-16 3 18 114 636402 223(a)(7) Westland MI 5,146,109.54 5.700 5.450 0.250 Mar-42 28,377.55 423 417 6 Dec-06 Feb-09 Feb-17 3 20 116 655503 232/223(f) Monroeville PA 5,115,796.08 5.250 5.000 0.250 Feb-42 26,729.74 421 416 5 Jan-07 Feb-08 Feb-17 11 8 116 655027 232/223(f) Los Angeles CA 5,095,921.38 5.600 5.350 0.250 Nov-41 27,852.76 419 413 6 Dec-06 Nov-08 Nov-16 3 17 113 655008 232 Fairport NY 5,031,383.36 5.750 5.500 0.250 Apr-30 37,025.01 282 274 8 Oct-06 Nov-08 Nov-16 3 17 113 659876 207/223(f) Dallas TX 4,732,545.31 6.250 6.000 0.250 Dec-36 29,308.14 359 354 5 Jan-07 Jan-09 Jan-13 8 19 67 645606 223(f) Maywood CA 4,670,214.51 5.320 5.070 0.250 Jan-42 24,633.43 421 415 6 Dec-06 Feb-08 Feb-17 11 8 116 645601 223(a)(7) Brooklyn NY 4,375,758.19 6.300 6.050 0.250 Dec-36 27,240.37 360 354 6 Dec-06 N/A Dec-10 5 N/A 42 655028 232/223(f) Los Angeles CA 4,260,203.60 5.600 5.350 0.250 Sep-40 23,576.98 405 399 6 Dec-06 Nov-08 Nov-16 3 17 113 622346 223(a)(7) Paintsville KY 4,228,395.69 5.500 5.125 0.375 Feb-47 21,859.38 481 476 5 Jan-07 Jan-09 Jan-17 3 19 115 639912 223(a)(7) Blacksburg VA 4,164,616.20 5.510 5.260 0.250 Dec-31 25,843.19 300 294 6 Dec-06 Jan-07 Jan-09 6 0 19 659891 207/223(f) Glenview IL 4,100,455.09 5.750 5.500 0.250 Jan-42 22,781.54 421 415 6 Dec-06 Feb-09 Feb-17 3 20 116 659885 223(f)/223(a)(7) Roanoke VA 4,078,956.18 5.350 5.100 0.250 Dec-41 21,612.07 419 414 5 Jan-07 Dec-08 Dec-16 3 18 114 659875 232/223(f) Roseville IL 4,045,579.03 6.140 5.890 0.250 Dec-31 26,641.68 300 294 6 Dec-06 Jan-09 Jan-17 3 19 115 659890 207/223(f) Lansing IL 3,985,988.83 5.930 5.680 0.250 Jan-37 23,840.38 360 355 5 Jan-07 Feb-09 Feb-17 3 20 116 639914 223(f) Ogden UT 3,827,395.37 6.300 6.050 0.250 Jan-42 22,674.91 421 415 6 Dec-06 Jan-09 Jan-17 3 19 115 D-8