Published in Eur. J. Biochem., 1988, 178, 277-328 (reprinted in Biochemical Nomenclature and Related Documents, 2nd edition, Portland Press, 1992, pages 278-329); Pure Appl. Chem., 1987, 59, 779-832. The location of errors indicated below refers to the location in the web version. Different styles and pagination resulted in differences between the printed versions.

Position 22 now labelled on the structural diagram.

TP-3.4 example 2

Systematic name corrected (7,12,18,Triethyl... replaced by 7,12,18-Triethyl...). [corrected in Eur. J. Biochem. version]

TP-4.1 example 3

The name corrected to 5,10,15,22-tetrahydro... (not 5,10,15,20-tetrahydro...).

TP-4.3.2 example 5

The structure corrected by adding a 12-methyl group.

TP-5.1 note 1

Reference corrected to F-4.5 (not F-4.13).

TP-5.2 note

Reference corrected to F-4.11 (not F-4.5).

TP-6.5 example 5

Since this document was prepared it has been shown that phycoerythrobilin has the published structure 5a but phycoviolobilin (phycobiliviolin) has the isomeric structure 5b.

TP-8.1 figure 24

Spelling of tetradentate corrected.

A. Porphyrins Fischer numbering

Isomer IX, CNOC/CAS numbering corrected to show Cet at position 18 (not Et) and
Isomer XI, CNOC/CAS numbering corrected to show Cet at position 8 (not Et).