7KXK Unmatched Contacts: 54 - B ASN 501 OD1 VS M SER 69 OG Distance: 3.63948265554324 - Hydrogen Bonds, 7KXK_uk_mut Unmatched Contacts: 58 - B TYR 505 OH VS M SER 69 N Distance: 3.0860092352421655 - Hydrogen Bonds,