Table 1.

Characteristics of SPIN elements

SpeciesTE name*Length, bpCopy no.Avg divergence, %
MouseSPIN_RodentNA<5NA
SPIN_NA_10_Rodent22534,04116.1
RatSPIN_RodentNA<5NA
SPIN_NA_10_Rodent22532,56716.5
BushbabySPIN_Og2,8367,1457.2
SPIN_NA_1_Og2258,4808.6
SPIN_NA_2_Og8017,49811.9
TenrecSPIN_Et2,87113,9639.4
SPIN_NA_1_Et22452,55110.4
SPIN_NA_6_Et48732,8249.4
BatSPIN_Ml28672,8063.9
SPIN_NA_7_Ml21221,1983.2
SPIN_NA_8_Ml1923,6935.5
SPIN_NA_9_Ml31110,6383.1
SPIN_NA_10_Ml22311,9843.3
OpossumSPIN_MdNA<5NA
SPIN_NA_3_Md1923,6713.9
SPIN_NA_4_Md71811365.7
FrogSPIN_XtNA<5NA
SPIN_NA_5_Xt1863,9925.2
LizardSPIN_AcNA<5NA
SPIN_NA_11_Ac§27312,1389.1
  • For each species in which SPIN elements were discovered, the name of the element along with the length, copy number (of both full-length and fragmented elements) and average percent sequence divergence from the consensus sequence are shown. A total of 12 distinct MITE families, along with consensus sequences, could be identified in the 8 species.

  • *MITE families are denoted with ″NA″ for nonautonomous.

  • NA indicates that a consensus sequence could not be derived because too few full-length copies could be identified.

  • NA indicates that an average percent divergence could not be determined for full-length SPIN elements due to low copy number and a high level of fragmentation.

  • §A complete consensus sequence for SPIN_NA_11_Ac, a lizard-specific MITE family, could not be confidently reconstructed due to uncertainty in its central region. The copy number for this family was estimated based on counts of the 5′ and 3′ terminal regions, for which a reliable consensus could be reconstructed.