Sentence examples for been described before when from inspiring English sources
This has been described before when an RNA-helicase of P. infestans was silenced with RNAi (Walker et al. 2008; Walker and van West, 2007).
Furthermore, the discrepancy between In-ibritumomab tiuxetan and Zr-ibritumomab tiuxetan uptake in liver and especially spleen has been described before when comparing In-DTPA-octreotide and Y-DOTA-octreotide as analogues of Y-DOTA-octreotide [ 27].
The issue of SNP variants in probe regions causing hybridization artifacts has been described before when short (25-mer) cDNA probes were used [ 45, 46], and more recently for long (60-mer) oligonucleotide probes [ 47].
Plasticity of LP cells has been described before: when transplanted under the renal capsule or into a humanized fat pad of immune compromised mice, human LP cells can give rise to structures containing both luminal and basal cells (Keller et al., 2010; Shehata et al., 2012).
The effect of the gastrin siRNA is of a similar order of magnitude to that which has been described before when antibodies to gastrin peptides, receptor antagonists or antisense have been used to downregulate gastrin (Hoosein et al, 1988; Singh et al, 1996; Smith et al, 1996, 2004), and suggests that gastrin is only one of a number of factors contributing to survival of GI cancer cells.
Conventional slab-gel IS typing for S. aureus has been described before [3], [6], [7], [8], and when we corrected for primer positions, we found that ten of the sixteen characteristic IS fragments that we found have previously been described by Gurtler et al [9].
Mechanisms of gene duplication when they are flanked by direct repeats have been described before [19], [20], [21].
