At the time of Vernam's work, all messages transmitted over AT&T's teleprinter system were encoded in the Baudot Code, a binary code in which a combination of marks and spaces represents a letter, number, or other symbol.
At that time all messages transmitted over AT&T's teleprinter system were encoded in the Baudot Code, a binary code in which a combination of marks and spaces represents a letter, number, or other symbol.
Instructions for the census's American Community Survey, which poses the question in the same way as the 2010 form, say that "people may choose to provide two or more races either by marking two or more race response boxes, by providing multiple write-in responses, or by some combination of marking boxes and writing in responses".
A combination of mark-recapture [5], ecological markers [6], [7], and sighting surveys [8] indicate that B. bonaerensis undertake seasonal migrations between feeding grounds in the Antarctic waters in the summer (south of 60°S), and breeding grounds in the tropical or temperate regions in the winter.
In undifferentiated ES cells this unusual combination of marks is thought to keep genes repressed or expressed at very low levels but poised for later activation.
In the example in Fig. 3B, the combination of Marker A ab)–Marker B bc)–Marker C bd) strongly influences the phenotype (red line), the combination of Marker A ab)–Marker B ac)–Marker C bd) has an intermediate influence (orange line), and the combination of Marker A ab)–Marker B ac)–Marker C ae) has a weak influence (green line).
In this equation, denotes the combination of marks at position t of gene c, extracting for, s = 1,..., 24.
In all the scenarios we studied (individual marks, combination of marks, and non-exonic filtering of ChIP regions), we consistently found that H3K4Me1 significantly peaked at embryonic stages.
With this information, one can better investigate whether a chromatin mark (or combination of marks) plays a causal role or a secondary role in gene silencing.
