Song   -  Down In a Hole
Album  -  Dirt
Artist -  Alice in chains
Tab By -  relic374
Mike Starr probably used a 4 string but its easiest to use a 5 string for this one. Make sure you're tuned to 
Eb Standard (A#,D#,G#,C#,F#; if I remember correctly)
Also I think this song is picked.
There are a lot of variations and little improvisations Mike Starr incorporates into this bass line. So 
definitely  mess around with it a bit, and add your own little touches and you should have a pretty solid 
replica of the actual track (note when you are improvising that there are a lot of bends Starr does randomly 
through out the song).

verse/intro:
Gb|-----------------------7-h9--7-5---|
Db|-----------5-5h7-------0--------5--|
Ab|------5----------------------------|
Eb|--5--7-----------2-3-5-------------|
Bb|-----------------------------------|
Gb|-------------------14---7h9p7-7\5--|
Db|---------7---------12--------------|
Ab|------5----------------------------|
Eb|--5-7--------2-3-------------------|
Bb|-----------------------------------|
Gb|-------------------7h9--7-5--|
Db|--------7--------------------|
Ab|------5--------0-5-----------|
Eb|--5-7------2-3---------------|
Bb|-----------------------------|
theres also this variation later on:
outro:
Gb|------------12--14--7h9p7-7\5--|
Db|--------7---10--12-------------|
Ab|------5------------------------|
Eb|--5--7-------------------------|
Bb|-------------------------------|
chorus/outro:
Gb|--------------------------------------|
Db|--------------------------------------|
Ab|--------------------------------------|
Eb|--5-5-5-5-5-5-5-3-3-3-3b--------------|
Bb|------------------------3-3-3-3-3-3---|
Gb|-------------------------------------------|
Db|-------------------------------------------|
Ab|-------------------------------------------|
Eb|--5-5-5-5-5-5-5-3-3-3-3b-------------------|
Bb|------------------------3-3-3-333-333-3-3--|
Gb|----------5-5-5-5-----------|
Db|----------------------------|
Ab|----------------------------|
Eb|------1-3--------3-3-3b--1--|
Bb|--3-3-----------------------|
Gb|-----------------5-5-5-----------------|
Db|---------------------------------------|
Ab|---------------------------------------|
Eb|------------1-3-5-----3-3-3-5b\\3b\\0--|
Bb|--3-3-3-3-3----------------------------|
end of chorus:
Gb|-----------------5-5-5----9-7----------------5-5-5-5--5-5-5-5---------------------------------|
Db|-----------------------------7----------------------------------------------------------------|
Ab|----------------------------------------------------------------------------------------------|
Eb|------------1-3-5-----3-3--------1------1----------------------3-3--3-3-3-3-3b---1-1---1-1-5--|
Bb|--3-3-3-3-3---------------------3--0--------------------------------------------------3-------|
****** legend ***********
* \  - slide down       *
* \\ - slow slide down  *
* h  - hammer on        *
* p  - pull             *
* b  - bend             *
*************************