globin

n. protein contained in hemoglobin

Globular proteins, or spheroproteins are one of the two main protein classes, comprising globelike proteins that are more or less soluble in aqueous solutions (where they form colloidal solutions). This main characteristic helps distinguishing them from fibrous proteins (the other class), which are practically insoluble.
See more at Wikipedia.org...

Globin /glo·bin/ 1. the protein constituent of hemoglobin. 2. any of a group of proteins similar to the typical globin. glo·bin n. [more]Globin - Community and Resources

Noun
1. a colorless protein obtained by removing heme from hemoglobin; the oxygen carrying compound in red blood cells
(synonym) hematohiston, haematohiston
(hypernym) simple protein
(substance-holonym) hemoglobin, haemoglobin, Hb

n. globin, protein contained in hemoglobin