Table 1. Nucleotide frequencies of TSD and its flanking sequences of complete elements (n = 59) and solo-LTRs (n = 112) of PbTRIM family.

Position	−5	−4	−3	−2	−1	T1	T2	T3	T4	+1	+2	+3	+4	+5
A	63	45	84	78	79	96	37	117	17	57	62	78	59	68
C	13	32	5	23	18	25	4	4	26	13	10	4	30	18
G	15	30	3	9	14	35	3	8	19	21	22	4	34	14
T	80	64	79	61	60	15	127	42	109	80	77	85	48	71

Note: T1 and T4 represent the 4 nucleotides of the TSD. The negative (−) and positive (+) signs respectively denote the upstream and downstream position of the nucleotide from the 4-bp TSD region.