The closest inter-chain contact in the vancomycin dimer (established previously) is between an O atom (chain A, residue GHP5) and an H atom (chain B, residue GHP5), at 2.0332 angstrom. Does this single distance measurement by itself confirm that this is a hydrogen bond, and does it by itself confirm that this is THE literature-documented dimerization interface reported in the original 1997 publication? Explain what additional evidence each of these two stronger claims would require.

This is a reasoning task over the already-established closest-contact result; no new coordinate file or calculation is required. Do not recompute the distance.