Errata and corrigenda

The sequence of hirullin P18 shown in Figure 1 omits a Gly residue at position 30. As a consequence the numbering of all of the peptides described in the paper is off by one in number. For example in the abstract ‘acetyl-hirullin P 1840-61’ should be ‘acetyl-hirullin P1841_62’. In Table I compounds l-5 are Ac-hirullin P1841_62, hirullin P1850_62, hirullin P 1 851_62, hirullin P 1852-62 and hirullin Pl&_62, respectively. The authors apologize for any difficulties or confusion that this may cause.