In the 2-5-1 chord progression in the key of C, the D minor 7 chord is the 2.
e|--------| b|--------| g|-5-7----|-c-d- D|-5-7-8--|-g-a-a#- A|-5-7-8--|-d-e-f- E|--------|
The D minor 7 arpeggios is made of the 1st, 3rd, 5th and 7th tone / degree of the D natural minor scale.
e|---------| b|---------| g|-------5-|-------c- D|-----7---|-----a- A|-5-8-----|-d-f- E|---------|
The mixolydian scale is a 5th mode of C natural major scale (the ionian scale).
In the 2-5-1 progression in the key of C, the G dominant 7 chord is the 5.
e|-------| b|-------| g|-------| D|-2-3-5-|-e-f-g- A|-2-3-5-|-b-c-d- E|---3-5-|-g-a-
The G dominant 7 arpeggio is made of the 1st, 3rd, 5th and 7th tone / degree of the G mixolydian scale.
e|---------| b|-------6-|-------f- g|-----7---|-----d- D|-5-9-----|-g-b- A|---------| E|---------|
This most probably the most used scale in western music.
In the 2-5-1 progression in the key of C, the C major 7 chord is the 1.
e|-------| b|-------| g|-2-4-5-|-a-b-c- D|-2-3-5-|-e-f-g- A|---3-5-|-c-d- E|-------|
The C major 7 arpeggio is made of the 1st, 3rd, 5th and 7th tone / degree of the G ionian scale.
e|---------| b|---------| g|-------4-|-------b- D|-----5---|-----g- A|-3-7-----|-c-e- E|---------|
e|---------| b|---------| g|-------4-|--------b- D|-----5---|------g- A|-4-7-----|-db-e- E|---------|
By connecting all the arpeggios in ascending and descending way, the 2-5-1 can be played continuously.
e|---------------------------------| b|---------------6-----------------|---------------f- g|-5-----------7---4-------------4-|-c-----------d---b--------------b- D|---7-----5-9-------5---------5---|---a-----g-b-------g----------g- A|-----8-5-------------7-3-4-7-----|-----f-d-------------e-c-db-e- E|---------------------------------|
e|----------|---------| b|----------|---------| g|----------|---------| D|-7---9-12-|-a---b---| A|-7-8---10-|-e-f---g-| E|-7-8---10-|-b-c---d-|
e|---------|-----------| b|---------|-----------| g|-6-7---9-|-c#-d---e--| D|-6-7---9-|-g#-a---b--| A|---7---9-|----e---f#-| E|---------|-----------|
e|---------|---------| b|---------|---------| g|---------|---------| D|-5---7---|-g---a---| A|-5---7-8-|-d---e-f-| E|-5---7-8-|-a---b-c-|
e|---------|------------| b|---------|------------| g|---------|------------| D|---7-8---|----a-a#----| A|-6-7---9-|-d#-e----f#-| E|-6---8-9-|-a#---c--c#-|
Bhdim7 Edom7/9 Amin7 A#dim7 e|----------------------------------|------------------------------------| b|-10-6-------------8-5-----------8-|-a-f--------------g-e-------------g-| g|------7-------4-7-----5-----6-9---|-----d--------b-d-----c------c#-e---| D|--------9---6-----------7-8-------|-------b---g#-----------a-a#--------| A|----------7-----------------------|---------e--------------------------| E|----------------------------------|------------------------------------|
Jazz 101 - 2-5-1 in 7ths | Dr3dweRkZ | Jazz 101 - 2-5-1 as 7th chords