This release contains only the music track from Base by Base Episode 305.

Song title: Letters That Light
Original Base by Base episode: 305: Human cis-regulatory variants dissected by MPRA at single-nucleotide resolution
Original episode link: https://basebybase.com/episodes/mpra-human-regulatory-variants

Article metadata:
Article title: Functional dissection of complex trait variants at single-nucleotide resolution
Journal: Nature, doi:10.1038/s41586-026-10121-6
DOI: 10.1038/s41586-026-10121-6
Reference: Siraj L., Castro R.I., Dewey H.B., Kales S., Butts J.C., Nguyen T.T.L., Kanai M., et al. Functional dissection of complex trait variants at single-nucleotide resolution. Nature. https://doi.org/10.1038/s41586-026-10121-6

Lyrics:
Verse 1
Long nights under bright screens, tracing letters in the code
Hundreds of thousands whisper, waiting for the road
We watch the tiny changes, trying to tell which ones explode
Silent lines that hold a promise, folded in the ode

Pre-Chorus
One by one the margins glow, a signal through the noise
A subset steps into the light, an answer in their voice
We lean in with our instruments, every barcode poised

Chorus
Map the switches, find the light, thirteen thousand came alive
From quiet letters to the songs that help a cell survive
We named the motifs, untangled tangled ties
A clearer path to causal truth before our eyes

Verse 2
Saturation called each base, fingerprints in steady frame
Ninety-one percent of mysteries now wear a name
But some nearby positions conspire, their effects not lone or tame
About eleven in a hundred show the twist of paired-up flame

Bridge
Precision climbs while full recall waits just outside the door
We map sequence to function, then push to test and more
Not the whole story—chromatin and tissues hide some lore
But every lit-up switch is one less thing we need to ignore

Final Chorus
Map the switches, find the light, thirteen thousand came alive
From tiny changes to the paths that help us learn and strive
These sequence-to-function maps will guide the hands that heal
We carry this small victory into every test and field