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310 mμ absorbance inPhysalia physalis: Distribution of the absorbance and isolation of a 310 mμ absorbing compound

Authors
Journal
Comparative Biochemistry and Physiology
0010-406X
Publisher
Elsevier
Publication Date
Volume
30
Issue
5
Identifiers
DOI: 10.1016/0010-406x(69)90042-5

Abstract

Abstract 1. 1. The Portuguese man-of-war, Physalia physalis, contains extractable material which absorbs intensely at 310 mμ. 2. 2. The highest 310 mμ absorbance per unit dry weight is found in portions of the float and in the ampullae that synthesize the nematocysts. 3. 3. A pigment, with λ max = 310 m μ ( ϵ ∼ 5 × 10 5) shifting to 298 mμ in strong acid, has been purified from Physalia float autolysate. 4. 4. It contains β-alanine, β-aminoisobutyric acid and probably tryptophan or a derivative thereof. 5. 5. It has a molecular weight of about 1200.

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