leghaemoglobinleghemoglobinn.
/ˌlɛɡˌhiːməˈɡləʊbɪn/, U.S. /ˌlɛɡˈhiməˌɡloʊbən/ Biochemistry.
A red pigment produced in the root nodules of leguminous plants, consisting of a haem-containing protein which regulates the supply of oxygen to the nitrogen-fixing bacteroids.
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leghaemoglobin1945
1945 A. I. Virtanen et al. in Suomen Kemistilehti B. 18 50 To avoid the long terms as e.g. ‘haemoglobin of the leguminous root nodules’ we have begun to use the terms: leghaemoglobin and legmethaemoglobin.
1974 Nature 6 Sept. 74/2 Leghaemoglobin (Lb), a myoglobin protein, is found in large quantities in the root nodules which result from the symbiotic association between the bacterium Rhizobium and plants of the family Leguminosae.
1990 K. Trehan Biotechnol. (2002) x. 167 Leghemoglobin is synthesized in the host cell and localized within the membrane envelope which surrounds the bacteroids in the nodules.
2009 J. W. MacAdam Struct. & Function Plants iii. 53 The pink color of the leghemoglobin can be seen in the healthy, many-lobed nodules of alfalfa.
This entry has been updated (OED Third Edition, March 2016; most recently modified version published online March 2022).
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n.1945