Sastry, LVS and Ramachandran, LK (1965) The protein components of elastoidin. In: Biochimica et Biophysica Acta (BBA) - General Subjects, 97 (2). pp. 281-287.
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Not all elastoidin samples from different species of sharks show a high content of tryptophan in contrast to one specimen from an unidentified species examined in our earlier study. There may be considerable species-dependent variation in tryptophan content and analytical artefacts may have occurred. Available analyses for tyrosine in different specimens of fibres also suggest the possibility that the variation in tyrosine content is also species-dependent. Elastoidin, from Galeoscerdo cuveir (Tiger Shark) and another unidentified species, on treatment with formic acid yielded three fractions A,B and C. On the basis of analytical data it appears that specimens of elastoidin containing no (or little) tryptophan may yield fraction B through the solubilization of fraction A by formic acid. C fractions from two specimens of fibres were collagenous in nature. C fractions have been further purified in this study by charcoal treatment which removes a tyrosine-rich contaminant, to yield collagens with only approx. 2–4 residues of tyrosine per assumed mol. wt. of 360000. In the collagen from the unidentified species glucose and galactose were present in the ratio of 2:5; some glucosamine was also present.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to Elsevier Science.|
|Department/Centre:||Division of Biological Sciences > Biochemistry|
|Date Deposited:||19 May 2010 10:15|
|Last Modified:||19 Sep 2010 06:07|
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