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Table 1 Rates of ligand binding of C. elegans globins compared to rates reported for other globins.

From: Globin-like proteins in Caenorhabditis elegans: in vivo localization, ligand binding and structural properties

  

C.elegans

GLB-1

C.elegans

GLB-26

H.sapiens

NGB

Sperm whale

Mb

A.suum

Hb

O 2

k on

μM -1 s -1

23

n.d.

250

14

3

 

k off

s -1

0.5

n.d

0.8

12

0.013

 

K = k on /k off

μM -1

46

n.d

313

1.1

215

 

P 50

torr

0.003

n.d

1

1

0.0072

His

k on

s -1

-

20000

-

-

-

 

k off

s -1

-

0.3

-

-

-

 

K = k on /k off

-

66667

-

-

-

CO

k on

μM -1 s -1

-

23

65

0.5

0.21

 

k off

s -1

-

0.05

0.01

0.02

0.018

 

K = k on /k off

μM -1

-

460

4643

28

12

  1. (values for H. sapiens Ngb and sperm whale Mb from ref [67] and for A. suum Hb from ref [68])
  2. n.d.: not detectable
  3. Note: KO2, obs = KO2, penta/(1+ KHis) = (kO2, on/kO2, off)/(1 + kHis, on)/kHis, off)