Two haemoglobins have been described that do not contain ac-chains: haemoglobin H (Rigas, Koler & Osgood, 1955, 1956; Gouttas, Fessas, Tsevremis & Xefteri, 1955) consists of four fA-polypeptide chains (Jones, Schroeder, Balog & Vinograd, 1959), and haemoglobin Bart's (Ager & Lehmann, 1958) consists of four yF-polypeptide chains (Hunt & Lehmann, 1959). These two abnormal haemoglobins are now ref...

Let K denote a field. Let d denote a nonnegative integer and consider a sequence p = (θi, θ ∗ i , i = 0...d;φj , φj , j = 1...d) consisting of scalars taken from K. We call p a parameter array whenever: (PA1) θi 6= θj, θ ∗ i 6= θ ∗ j if i 6= j, (0 ≤ i, j ≤ d); (PA2) φi 6= 0, φi 6= 0 (1 ≤ i ≤ d); (PA3) φi = φ1 ∑i−1 h=0 θh−θd−h θ0−θd + (θ i − θ ∗ 0)(θi−1 − θd) (1 ≤ i ≤ d); (PA4) φi = φ1 ∑i−1 h=0 ...

Let K denote a field. Let d denote a nonnegative integer and consider a sequence p = (θi, θ ∗ i , i = 0...d;φj , φj , j = 1...d) consisting of scalars taken from K. We call p a parameter array whenever: (PA1) θi 6= θj, θ ∗ i 6= θ ∗ j if i 6= j, (0 ≤ i, j ≤ d); (PA2) φi 6= 0, φi 6= 0 (1 ≤ i ≤ d); (PA3) φi = φ1 ∑i−1 h=0 θh−θd−h θ0−θd + (θ i − θ ∗ 0)(θi−1 − θd) (1 ≤ i ≤ d); (PA4) φi = φ1 ∑i−1 h=0 ...

OBJECTIVE The human sodium iodide symporter (hNIS) is a candidate autoantigen in autoimmune thyroid diseases. To investigate the possible existence of autoantibodies able to interfere with the biological activity of hNIS, an assay was developed using a cell line stably expressing hNIS. METHODS hNIS complementary cDNA cloned in pcDNA3 and a neomycin resistance gene vector were co-transfected i...

Sir, The Acinetobacter baumannii strain ATCC 17978 for which a genome sequence is available (GenBank accession number CP000521) was isolated in France in 1951, when antibiotic therapy was in its infancy. The sul1 sulphonamide resistance determinant and dfrA10 (dhfrX) trimethoprim resistance gene were reported to be present in this isolate. However, we were unable to find either gene in this gen...

Abdominal-B (Abd-B) mutants of the bithorax-complex (BX-C) were studied in trans with tuh-3 to evaluate their interactions with this homeotic mutant and the maternal effect locus (tuh-I) controlling tuh-3 expression. Head defects occur in tuh-3 offspring from tuh-lh homozygous mothers, while genital defects occur in homozygous tuh-3 offspring from mothers carrying the tuh-Ig allele. The influen...

ion also makes use of a model of the world and can be viewed as a deliberative approach to solve reasoning tasks. As an antithesis to this classical AI paradigm (and in particular to the planning paradigm) an approach has been developed that explicitly does not make use of knowledge representation and complicated deliberations (such as planning the best next step in the proof search). Brooks ph...