期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1973
卷号：70
期号：4
页码：1073-1077
DOI：10.1073/pnas.70.4.1073
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Protein Hal is a human {gamma}4 heavy-chain disease protein whose molecular weight is reduced from 55,000 to 25,000 in 6 M guanidine due to the lack of disulfide bonds between heavy chains. Studies of aminoacid sequence indicate that it contains a gap of about 240 residues, starting 10 residues from the N-terminal end and including the rest of the Fd fragment, as well as the hinge region. Normal sequence apparently resumes at a methionine residue (position 252) in the second constant domain (CH2) and seems normal from there to the carboxyl end of the molecule. These results imply that reinitiation of translation at an internal AUG codon occurs in protein Hal.
