抄録
Crystallographic studies of chemically modified hemoglobins and myoglobins are reviewed. Since each subunit of these proteins is composed of polypeptide chain (globin) and heme, two kinds of modification were applied ; that of the globin and of the heme group. The relation between structural change and oxygen affinity has been understood by comparison of the structures of myoglobins reconstituted with a variety of modified hemes with that of native one.
