Upper HB3 PRO 58 - HN PHE 59 4.01 1 0.13 0.21 * Upper HB VAL 70 - HN LEU 71 4.04 1 0.04 0.21 * Upper HN ASP- 76 - HB3 ASP- 76 3.27 1 0.02 0.21 * Upper HN ASN 69 - HB VAL 70 4.26 1 0.02 0.22 * Upper HB2 GLN 17 - HN VAL 18 3.76 1 0.02 0.26 * Upper HB2 LEU 63 - HN ALA 64 3.76 1 0.01 0.25 * Cutoffs: Upper distance limits : 0.20 A