Table 1.

Correlation between Phased A_n/T_n Cluster (PATC) content and preference for interaction with chromosome arms

Correlations for arms regions ONLY	chrI	chrII	chrIII	chrIV	chrV	chrX
log2(arms/centers) vs. PATCs 25KB Pearson R values	0.38	0.37	0.17	0.44	0.26	0.51
log2(arms/centers) vs. PATCs 25KB Spearman R values	0.36	0.50	0.18	0.45	0.48	0.49
log2(arms/centers) vs. PATCs 50KB Pearson R values	0.50	0.58	0.25	0.54	0.30	0.63
log2(arms/centers) vs. PATCs 50KB Spearman R values	0.46	0.60	0.25	0.55	0.58	0.61

To measure correlation of inter-chromosomal contacts between chromosomal arms regions (defined according to [20]) and PATC enrichment we divided the genome into 25KB (50KB) non-overlapping intervals. For each interval we measured the enrichment for PATC by counting the number of locations with high PATC score (defined as regions with a score of >55 using the algorithm of [29]). In order to measure the level of enrichment of inter-chromosomal arm-arm contacts over the arm-centers contacts we calculate the number of inter-chromosomal arm-arm contacts and number of inter-chromosomal arm-center contacts for every interval. Log₂ value of the enrichment for inter-chromosomal arm-arm contacts is used to calculate correlation with PATC enrichment in different genomic regions