A new B*78 variant, B*7804, was detected in three members of a Hispanic fam
ily. The novel B*78 sequence differs from B*78021 by two substitutions: T a
t nucleotide 527 (all other B*78s have A) and T at nucleotide 583 (all othe
r B*78s have a C). Both nucleotide substitutions encode amino acid changes
at codons 152 and 171, respectively.