diff --git a/Project.toml b/Project.toml
index dde55af..6407961 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "ProtPlot"
 uuid = "77b3afcc-388a-4e14-926d-b99c82d1a01f"
 authors = ["Anton Oresten <anton.oresten42@gmail.com>"]
-version = "0.4.4"
+version = "0.4.5"
 
 [deps]
 AssigningSecondaryStructure = "8ed43e74-60fb-4e11-99b9-91deed37aef7"
diff --git a/src/ProtPlot.jl b/src/ProtPlot.jl
index 717f2ae..fde3ed7 100644
--- a/src/ProtPlot.jl
+++ b/src/ProtPlot.jl
@@ -1,5 +1,12 @@
 module ProtPlot
 
+export Ribbon, ribbon, ribbon!
+export ribbon_scene
+
+export Ramachandran, ramachandran, ramachandran!
+
+export PDBEntry
+
 using Makie
 using ColorTypes
 
@@ -9,17 +16,12 @@ export Backboner, readpdb
 
 import BioStructures
 
-function PDBEntry(pdbid::AbstractString; format=BioStructures.PDBFormat, kwargs...)
-    chains = mktempdir() do temp_dir
-        path = BioStructures.downloadpdb(pdbid; dir=temp_dir, kwargs...)
-        Backboner.Protein.readchains(path, format)
-    end
-    return chains
-end
-
-export PDBEntry
-
 include("Ribbon/Ribbon.jl")
 include("ramachandran.jl")
 
+PDBEntry(pdbid::AbstractString; format=BioStructures.PDBFormat, kwargs...) = mktempdir() do dir
+    path = BioStructures.downloadpdb(pdbid; dir, format, kwargs...)
+    Backboner.Protein.readchains(path, format)
+end
+
 end
diff --git a/src/Ribbon/Ribbon.jl b/src/Ribbon/Ribbon.jl
index d60ed42..1e78351 100644
--- a/src/Ribbon/Ribbon.jl
+++ b/src/Ribbon/Ribbon.jl
@@ -1,7 +1,3 @@
-export Ribbon, ribbon, ribbon!, ribbon_scene
-
-using Makie
-
 @recipe(Ribbon, chains) do scene
     Attributes(
         secondary_structures = nothing,
@@ -32,6 +28,7 @@ include("render.jl")
 # TODO: observe chains and re-render when they change
 function Makie.plot!(ribbon::Ribbon{<:Tuple{<:AbstractVector{<:AbstractArray{T,3}}}}) where T<:Real
     chain_backbones = convert.(Array{T,3}, collect(ribbon[1][]))
+    filter!(c -> size(c, 3) > 1, chain_backbones)
     isnothing(ribbon.secondary_structures[]) && (ribbon.secondary_structures[] = _assign_secondary_structure(chain_backbones))
     isnothing(ribbon.colors[]) && (ribbon.colors[] = [range(0, 1, size(chain_backbone, 3)) for chain_backbone in chain_backbones])
     render!(ribbon, chain_backbones)
diff --git a/src/Ribbon/render.jl b/src/Ribbon/render.jl
index 3d0732c..66423be 100644
--- a/src/Ribbon/render.jl
+++ b/src/Ribbon/render.jl
@@ -20,7 +20,7 @@ end
 
 function render_lines_between_subchains!(ribbon::Ribbon, chain_backbone_partitions::Vector{Array{T,3}}, color=:lightgray, linewidth=2) where T<:Real
     for i in 1:length(chain_backbone_partitions)-1
-        startpoint, endpoint = @views chain_backbone_partitions[i][:, 2, end], chain_backbones_partitions[i+1][:, 2, 1]
+        startpoint, endpoint = @views chain_backbone_partitions[i][:, 2, end], chain_backbone_partitions[i+1][:, 2, 1]
         n_segments = trunc(Int, norm(endpoint - startpoint) / 0.8)
         xs, ys, zs = [range(startpoint[i], endpoint[i], 2*n_segments) for i in 1:3]
         linesegments!(ribbon, xs, ys, zs; linewidth=linewidth, color=color, transparency=true)
@@ -48,4 +48,4 @@ function render!(ribbon::Ribbon, chain_backbones::Vector{Array{T,3}}) where T<:R
         render_lines_between_subchains!(ribbon, chain_backbone_partitions)
     end
     return nothing
-end
\ No newline at end of file
+end
diff --git a/src/Ribbon/utils.jl b/src/Ribbon/utils.jl
index 04893ca..8928c4e 100644
--- a/src/Ribbon/utils.jl
+++ b/src/Ribbon/utils.jl
@@ -37,4 +37,4 @@ function get_subchain_ranges(chain_backbone::Array{T,3}, cn_distance_tolerance=2
     end
     push!(ranges, start_i+1:chain_length)
     return ranges
-end
\ No newline at end of file
+end
diff --git a/src/ramachandran.jl b/src/ramachandran.jl
index 103a380..8b2c30c 100644
--- a/src/ramachandran.jl
+++ b/src/ramachandran.jl
@@ -1,5 +1,3 @@
-export Ramachandran, ramachandran, ramachandran!
-
 @recipe(Ramachandran, phi_angles, psi_angles) do scene
     Attributes(
         color = :black,
@@ -33,4 +31,4 @@ function Makie.convert_arguments(::Type{<:Ramachandran}, chains::Vector{Backbone
     return (phi_angles, psi_angles)
 end
 
-Makie.convert_arguments(T::Type{<:Ramachandran}, pdbfile::AbstractString) = Makie.convert_arguments(T, Backboner.Protein.readchains(pdbfile))
\ No newline at end of file
+Makie.convert_arguments(T::Type{<:Ramachandran}, pdbfile::AbstractString) = Makie.convert_arguments(T, Backboner.Protein.readchains(pdbfile))