Even a male cell can count the number of X chromosomes. (Lee et al. 1996; Cell 86: 83-84) When X inactivation is getting started the two chromosomes "kiss" - a process that lasts for a couple of hours (first shown by Jeannie Lee in 1996). The physical contact between two X chromosomes is over a small fraction of the chromosome but it's essential for ...


From my searches, there is no single resource that includes an atlas of all human proteins produced across all human cell types. However, there are several recent mass spectrometry studies that look at cell-type-resolved proteomes for specific human and mouse tissues that provide some insight into the distribution of proteins across different cells. A ...


This is an interesting question. A recent study published on bioRxiv by researchers from Xi'an, China (pre-print) argues that CD147 can also be an entry receptor for the virus. They showed virus entry can be blocked by an antibody to human CD147.

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