Abstract:
:The AF-4 gene on human chromosome 4q21 is involved in reciprocal translocations to the ALL-1 gene on chromosome 11q23, which are associated with acute lymphoblastic leukaemias. A set of recombinant phage carrying genomic fragments for the coding region and flanking sequences of the AF-4 gene were isolated. Phage inserts were assembled into four contigs with 21 exons, and an intron phase map was produced enabling the interpretation of translocation-generated fusion proteins. The gene contains two alternative first exons, 1a and 1b, both including a translation initiation codon. The translocation breakpoint cluster region is flanked by exons 3 and 6 and two different polyadenylation signals were identified. Polyclonal antisera directed against three different portions of the AF-4 protein were produced and used to detect a 116 kD protein in cellular extracts of human B-lymphoblastoid and proB cell lines. In mitogen-stimulated human peripheral blood mononuclear cells the AF-4 antigen was predominantly located in the nucleus. The AF-4 gene is a member of the AF-4, LAF-4 and FMR-2 gene family. The members of this family encode serine-proline-rich proteins with properties of nuclear transcription factors. Comparison of AF-4 protein coding sequences with the LAF-4 and FMR-2 sequences revealed five highly conserved domains of potential functional relevance.
journal_name
Br J Haematoljournal_title
British journal of haematologyauthors
Nilson I,Reichel M,Ennas MG,Greim R,Knörr C,Siegler G,Greil J,Fey GH,Marschalek Rdoi
10.1046/j.1365-2141.1997.1522966.xsubject
Has Abstractpub_date
1997-07-01 00:00:00pages
157-69issue
1eissn
0007-1048issn
1365-2141journal_volume
98pub_type
杂志文章abstract::2-3-Dihydroxybenzoic acid was evaluated as a potentially useful, orally effective iron-chelating drug by performing iron balance studies in patients with beta-thalassaemia major. The administration of this substance at 25 mg/kg/d to five patients for 8 d caused an average increase in iron excretion of 4.5 mg/d. When t...
journal_title:British journal of haematology
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