John D. Freeman

Learn More
Fusobacterium nucleatum infection is prevalent in human colorectal carcinoma Mauro Castellarin, René L. Warren, J. Douglas Freeman, Lisa Dreolini, Martin Krzywinski, Jaclyn Strauss, Rebecca Barnes, Peter Watson, Emma Allen-Vercoe, Richard A. Moore, and Robert A. Holt BC Cancer Agency, Michael Smith Genome Sciences Centre, Vancouver, British Columbia V5Z(More)
Two mutagenic events are required to make null mutations of polyhomeotic (ph), which suggests that the locus is complex. Amorphic mutations (ph degrees) die in mid-embryogenesis and completely lack ventral thoracic and abdominal epidermal derivatives, whereas single-event mutations lead to transformations similar to those of known dominant gain of function(More)
Massively parallel sequencing is a useful approach for characterizing T-cell receptor diversity. However, immune receptors are extraordinarily difficult sequencing targets because any given receptor variant may be present in very low abundance and may differ legitimately by only a single nucleotide. We show that the sensitivity of sequence-based repertoire(More)
Programmed cell death (PCD), important in normal animal physiology and disease, can be divided into at least two morphological subtypes, including type I, or apoptosis, and type II, or autophagic cell death. While many molecules involved in apoptosis have been discovered and studied intensively during the past decade, autophagic cell death is not well(More)
T-cell receptor (TCR) genomic loci undergo somatic V(D)J recombination, plus the addition/subtraction of nontemplated bases at recombination junctions, in order to generate the repertoire of structurally diverse T cells necessary for antigen recognition. TCR beta subunits can be unambiguously identified by their hypervariable CDR3 (Complement Determining(More)
The repetitive ETn (early transposon) family of sequences represents an active "mobile mutagen" in the mouse genome. The presence of long terminal repeats (LTRs) and other diagnostic features indicate that ETns are retrotransposons but they contain no long open reading frames or documented similarity to the genes of known retroviruses or other(More)
Ly-49 (YE1/48, A1) is a dimer protein expressed on subpopulations of murine NK cells. It is a member of a superfamily of type II transmembrane proteins containing carbohydrate recognition domains (CRD). In the mouse genome, the detection of multiple restriction fragments that cross-hybridize with Ly-49 cDNA probes suggests the presence of related genes. In(More)
The recognition of class I MHC molecules on target cells by the Ly-49 family of receptors regulates NK cytotoxicity. Previous studies have suggested that carbohydrates are involved in the recognition of class I MHC by Ly-49, although their precise role remains unclear. Here, we examined the role of asparagine-linked carbohydrates of the murine class I MHC(More)
The insect steroid hormone ecdysone triggers programmed cell death of obsolete larval tissues during metamorphosis and provides a model system for understanding steroid hormone control of cell death and cell survival. Previous genome-wide expression studies of Drosophila larval salivary glands resulted in the identification of many genes associated with(More)
The HERV-H family of endogenous retrovirus like elements is the largest such human family known. Using an HERV-H LTR probe, 6 and 4.5 kb transcripts were detected by Northern blot analysis which were induced in normal peripheral T cells after treatment with phytohaemaglutinin (PHA). Expression was not evident 30 min after treatment with phorbol ester, was(More)