The iron-containing part of hemoglobin that binds oxygen and gives blood its red color.
Shortened form of hemoglobin, derived from Greek haima (blood). Scientists simplified the name when discussing the iron-containing molecule separate from the protein surrounding it.
Heme is a perfect example of modular biochemistry—the same heme group appears in hemoglobin (blood), myoglobin (muscle), and even some bacterial proteins, showing how evolution reuses successful molecular designs.
Complete word intelligence in one call. Free tier — 50 lookups/day.