Alkylation of rat lens crystallins with iodoacetamide

• Main Author: Haynes, Linda Rose
• Other Authors: Biochemistry and Nutrition
• Format: Others
• Language: en
• Published: Virginia Tech 2014
• Subjects: LD5655.V855 1977.H39; Alkylation
• Online Access: http://hdl.handle.net/10919/43951; http://scholar.lib.vt.edu/theses/available/etd-07282010-020246/

Alkylation of lens proteins with iodoacetamide during homogenization of tissue (50 millimolar excess) immediately followed by gel-permeation chromatography yielded a crystallin population devoid of βH-crystallin. This result occurred in lens homogenates from both young (100 g) and older (400 g) male rats. BetaH-crystallin was not converted to insoluble protein with alkylation. Each crystallin fraction reacted with radioactive iodoacetamide in proportion to sulfhydryl content; at a ratio of 1 mg iodoacetamide/mg protein total free-sulfhydryl of the crystallins had reacted after 1 hr at pH 8, 25°C. Alkylated α-, βL-' and y-crystallin fractions demonstrated no altered chromatographic behavior on Sephacryl S-200; only alkylated βH-crystallin was altered so that it co-chromatographed with control or alkylated βL-crystallin. === Master of Science