3.   b.64.1        Mannose 6-phosphate receptor domain    
                   Mannose 6-phosphate receptor domain barrel, partly open; n*=8, S*=10; one psi loop
                   1syo  d1syoa3  A:323-329,345-351,391-399,407-418,419-428
                   1syo  d1syob3  B:1323-1329,1345-1351,1391-1399,1407-1418,1419-1428
                   1syo  d1syoa2  A:166-172,195-201,241-250,260-267,268-276
                   1sz0  d1sz0b3  B:1323-1329,1345-1351,1391-1401,1410-1418,1419-1428
                   1sz0  d1sz0a2  A:167-172,195-201,241-250,260-267,268-276
                   2rl7  d2rl7a1  A:43-50,62-70,112-120,125-132,143-150
                   1sz0  d1sz0a3  A:323-329,345-351,391-401,411-418,419-428
                   1q25  d1q25a3  A:323-329,345-351,391-401,411-418,419-428
                   1sz0  d1sz0b2  B:1167-1172,1195-1201,1242-1250,1260-1267,1268-1276
                   1e6f  d1e6fa_  A:1545-1551,1564-1569,1606-1615,1624-1632,1633-1643
                   1e6f  d1e6fb_  B:1545-1551,1564-1569,1606-1615,1624-1632,1633-1643
                   1gqb  d1gqbb_  B:38-44,57-62,99-108,117-125,126-136
                   1gqb  d1gqba_  A:38-44,57-62,99-108,117-125,126-136
                   1gp3  d1gp3a_  A:1545-1551,1564-1569,1606-1615,1624-1632,1633-1643
                   1gp0  d1gp0a_  A:1545-1551,1564-1569,1606-1615,1624-1632,1633-1643
                   1q25  d1q25a1  A:24-31,46-53,87-96,99-110,111-120
                   1syo  d1syoa1  A:24-31,46-53,87-97,102-110,111-120
                   1sz0  d1sz0b1  B:1024-1031,1046-1053,1087-1097,1099-1110,1111-1120
                   1sz0  d1sz0a1  A:24-31,46-53,88-97,99-110,111-120
                   1syo  d1syob1  B:1024-1031,1046-1053,1088-1097,1103-1110,1111-1120
                   2rl7  d2rl7d1  D:43-50,63-70,112-121,125-132,143-150
                   2rl7  d2rl7b1  B:43-50,63-70,112-121,125-132,143-150