Table II.
Chl Species
|
Metal (Mg)
|
C-Position
|
Km
|
||||
---|---|---|---|---|---|---|---|
C17a | C7 | C17-C18b | C7-C8b | Type 1 | Type 2 | ||
μm | |||||||
Porphyrins | |||||||
ProtoChlid a | + | Propionyl | CH3 | Double | Double | – | – |
ProtoPheid a | − | Propionyl | CH3 | Double | Double | – | – |
Pheophytin c | − | Acryl | CH3 | Double | Double | – | – |
Dihydroporphyrins | |||||||
Chl a | + | Phytyl | CH3 | Single | Double | – | – |
Chl b | + | Phytyl | CHO | Single | Double | – | – |
Chlid a | + | Propionyl | CH3 | Single | Double | – | – |
Pheophytin a | − | Phytyl | CH3 | Single | Double | – | – |
Pheid a | − | Propionyl | CH3 | Single | Double | 14 | 15 |
Pheid a′ | − | Propionyl | CH3 | Single | Double | – | – |
Pheid b | − | Propionyl | CHO | Single | Double | 243 | 232 |
Tetrahydroporphyrins | |||||||
Bacterio-Chl a | + | Phytyl | CH3 | Single | Single | – | – |
Bacterio-Pheid a | − | Propionyl | CH3 | Single | Single | 39 | 37 |
Phytyl, -CH2-CH2-COOC20H30; propionyl, -CH2-CH2-COOH; acryl, -CH = CH-COOH.
Single, single bond; Double, double bond.