This is a rare case where one of the unbound structures is an NMR
structure.  We used 
one of the models from 1EGL.  
NOTE THAT IN THE ALIGNMENTS BELOW, GAPS MOST LIKELY INDICATE
RESIDUES MISSING IN THE ELECTRON DENSITY.  
Alignment: 1ACB_E against 2CGA_B
Query= 
         (241 letters)
>2CGA_B
          Length = 245
 Score =  485 bits (1249), Expect = e-142
 Identities = 241/245 (98%), Positives = 241/245 (98%), Gaps = 4/245 (1%)
Query: 1   CGVPAIQPVLSGL--IVNGEEAVPGSWPWQVSLQDKTGFHFCGGSLINENWVVTAAHCGV 58
           CGVPAIQPVLSGL  IVNGEEAVPGSWPWQVSLQDKTGFHFCGGSLINENWVVTAAHCGV
Sbjct: 1   CGVPAIQPVLSGLSRIVNGEEAVPGSWPWQVSLQDKTGFHFCGGSLINENWVVTAAHCGV 60
Query: 59  TTSDVVVAGEFDQGSSSEKIQKLKIAKVFKNSKYNSLTINNDITLLKLSTAASFSQTVSA 118
           TTSDVVVAGEFDQGSSSEKIQKLKIAKVFKNSKYNSLTINNDITLLKLSTAASFSQTVSA
Sbjct: 61  TTSDVVVAGEFDQGSSSEKIQKLKIAKVFKNSKYNSLTINNDITLLKLSTAASFSQTVSA 120
Query: 119 VCLPSASDDFAAGTTCVTTGWGLTRY--ANTPDRLQQASLPLLSNTNCKKYWGTKIKDAM 176
           VCLPSASDDFAAGTTCVTTGWGLTRY  ANTPDRLQQASLPLLSNTNCKKYWGTKIKDAM
Sbjct: 121 VCLPSASDDFAAGTTCVTTGWGLTRYTNANTPDRLQQASLPLLSNTNCKKYWGTKIKDAM 180
Query: 177 ICAGASGVSSCMGDSGGPLVCKKNGAWTLVGIVSWGSSTCSTSTPGVYARVTALVNWVQQ 236
           ICAGASGVSSCMGDSGGPLVCKKNGAWTLVGIVSWGSSTCSTSTPGVYARVTALVNWVQQ
Sbjct: 181 ICAGASGVSSCMGDSGGPLVCKKNGAWTLVGIVSWGSSTCSTSTPGVYARVTALVNWVQQ 240
Query: 237 TLAAN 241
           TLAAN
Sbjct: 241 TLAAN 245
Alignment: 1ACB_I against 1EGL_
Query= 
         (63 letters)
>1EGL_
          Length = 63
 Score =  137 bits (345), Expect = 2e-37
 Identities = 63/63 (100%), Positives = 63/63 (100%)
Query: 1   KSFPEVVGKTVDQAREYFTLHYPQYDVYFLPEGSPVTLDLRYNRVRVFYNPGTNVVNHVP 60
           KSFPEVVGKTVDQAREYFTLHYPQYDVYFLPEGSPVTLDLRYNRVRVFYNPGTNVVNHVP
Sbjct: 1   KSFPEVVGKTVDQAREYFTLHYPQYDVYFLPEGSPVTLDLRYNRVRVFYNPGTNVVNHVP 60
Query: 61  HVG 63
           HVG
Sbjct: 61  HVG 63