Isolation and preliminary characterization of tear prealbumin from human ocular mucus
作者:
Chyou W.Chien,
ButalaSusan M.,
期刊:
Current Eye Research
(Taylor Available online 1986)
卷期:
Volume 5,
issue 12
页码: 895-901
ISSN:0271-3683
年代: 1986
DOI:10.3109/02713688608995169
出版商: Taylor&Francis
数据来源: Taylor
摘要:
Tear prealbumin was purified from crude tear prealbumin previously isolated from the saline soluble human ocular mucus. Purification was achieved by further column chromatographies on DEAE Sephadex A-25 and Sephadex G-75. Preliminary characterization included amino acid analysis, gel electrophoresis, and isoelectric focusing. Unlike serum prealbumin, the purified tear prealbumin showed a predominance of acidic residues and a trace amount of tryptophan. It exhibited polymorphic nature, with pi values of 4.8 and 4.9. The possibility of a tear prealbumin/retinol complex was also examined. The protein was found to incorporate with 3H retinol. The % retinol-incorporated tear prealbumin did not exhibit the characteristic UV spectrum of retinol; however, it did display emission and excitation fluorescence spectra at high concentrations similar to serum retinol-binding protein.
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