Biotin-XX-tyramide (biotin-XX-phenol; BxxP) is a membrane-impermeant variant of the proximity labeling probe biotin-tyramide (biotin-phenol; BP) that corresponds to BP with a long and polar polyamide linker. Similary to BP, BxxP gives robust biotinylation with HRP and H2O2, but unlike BP, BxxP no longer enters cells, yielding selective labeling of cell surface, but not intracellular, proteins.
Characterization of the epigenetic status of individual cells remains a challenge. Current sequencing approaches have limited coverage, and it is difficult to assign an epigenetic status to the transcription state of individual gene alleles in the same cell. To address
Cellular compartments that cannot be biochemically isolated are challenging to characterize. Here we demonstrate the proteomic characterization of the synaptic clefts that exist at both excitatory and inhibitory synapses. Normal brain function relies on the careful balance of these opposing
Journal of the American Society for Mass Spectrometry, 31(2), 394-404 (2020-01-16)
The use of biotin or biotin-containing reagents is an essential component of many protein purification and labeling technologies. Owing to its small size and high affinity to the avidin family of proteins, biotin is a versatile molecular handle that permits
Molecular interactions at the cellular interface mediate organized assembly of single cells into tissues and, thus, govern the development and physiology of multicellular organisms. Here, we developed a cell-type-specific, spatiotemporally resolved approach to profile cell-surface proteomes in intact tissues. Quantitative
Although intramuscular (i.m.) administration is the most commonly used route for licensed vaccines, subcutaneous (s.c.) delivery is being explored for several new vaccines under development. Here, we use rhesus macaques, physiologically relevant to humans, to identify the anatomical compartments and
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