To the Editor: In a recent paper by Hu et al. [1], a one-locus, three-allele system is proposed for the three forms ofhuman oculocutaneous albinism. In table 3 of their report, tyrosinase-positive (ty-pos) and tyrosinase-negative (ty-neg) albinism are shown to be, respectively, the heterozygous and homozygous states of the t allele. Previous work by others, as well as their own data, would seem...

We have determined the nucleotide sequence of a complete yeast Ty element (Ty-pY109) which is located near a tRNA(Lys1) gene. The element is 5912 bp in length; the internal domain is flanked by two identical delta sequences of 331 bp. Ty-pY109 contains two large open reading frames (ORFs) which overlap by 38 bp; the putative proteins consist of 440 and 1328 amino acid residues, respectively. Th...

1 Department o f Animal Nutr i t ion, Universi ty of Veter inary and Animal Sc iences, Lahore, 2 Department o f Ther iogeno logy, Facul ty o f Veter inary Sciences, Bahauddin Zakar iya Univers i ty, Mul tan, Pakis tan 3 Department o f Patho logy, Arid Agr icul ture Univers i ty, Rawalp indi , Pakis tan 4 Department o f Basic Sciences, Sub campus Jhang, Univers i ty o f Veter inary and Animal Sc...

background: anxiety is a basic human emotion. however, when taken to extremes it may produce unwarranted results. one of the most threatening events that cause anxiety in students today is testing. this study investigated the relationship between test anxiety and academic performance of midwifery students in islamic azad university, najaf abad branch. methods: in this descriptive-sectional stud...

Extrachromosomal circular DNA (eccDNA) derived from chromosomal Ty retrotransposons in yeast can be generated in multiple ways. Ty eccDNA can arise from the circularization of extrachromosomal linear DNA during the transpositional life cycle of retrotransposons, or from circularization of genomic Ty DNA. Circularization may happen through nonhomologous end-joining (NHEJ) of long terminal repeat...

In this note we show that the system of equations tx + ty = tp, ty + tz = tq , tx + tz = tr , where tx = x(x + 1)/2 is a triangular number, has infinitely many solutions in integers. Moreover we show that this system has rational three-parametric solution. Using this result we show that the system tx + ty = tp, ty + tz = tq , tx + tz = tr , tx + ty + tz = ts has infinitely many rational two-par...

We present a complete description of $2$-dimensional equations that arise as symmetry reductions fourf $3$-dimensional Lax-integrable equations: (1) the universal hierarchy equation~$u_{yy}=u_zu_{xy}-u_yu_{xz}$; (2) 3D rdDym equation $u_{ty}=u_xu_{xy}-u_yu_{xx}$; (3) The basic Veronese web $u_{ty}=u_tu_{xy}-u_yu_{tx}$; (4) Pavlov's $u_{yy}=u_{tx}+u_yu_{xx}-u_xu_{xy}$.

Příslovečné spřežky se vyznačují jednak pozicí na pomezí mluvnice a slovní zásoby, frazeologizovanou povahou. Jejich základem bývá spojení slova neplnovýznamového (předložky) s plnovýznamovým. Nově vzniklé nabývá zpravidla jiného významu, mnohdy zcela odlišného od původního významu jeho jednotlivých izolovaných komponentů. Ve výuce pokročilejších zahraničních bohemistů by měla být věnována přís...